The Original CZ Forum

CZ LONG ARMS => CZ BREN => Topic started by: tommyguns on April 12, 2022, 10:51:01 AM

Title: 7.62x39 fix??
Post by: tommyguns on April 12, 2022, 10:51:01 AM
has anyone heard or have a concrete source as to the supposed fix of the over gas issue from CZ? I have seen at a couple different forums that they have a new regulator to fix problem but I tried to e mail CZ and the contact page was down. Hopefully info on the fix and how you can obtain a new regulator.
Title: Re: 7.62x39 fix??
Post by: Bret on April 19, 2022, 11:27:04 AM
Yes.  I spoke with them recently.  I was told that the issue is going to be resolved by replacing the gas tubes.  They're different depending on the length.  The guy I spoke with said that I had to send in the rifle to have the gas tube replaced.  When I asked why not just send me the replacement gas tube, he said it's because they want to function test it and for liability reasons.  I told him that mine is a SBR to which he replied that there was an additional ATF form that I'd have to fill out.  I had to go to their website and fill out their RMA request form.  I was then emailed a FedEx call tag, but nothing about the ATF form.  So, I emailed back.  The person who responded said that I didn't have to send my SBR in and they'd just send me the gas tube when it arrives.  I received an email today stating "Changed incident type so that the firearm does not need to be sent in and created a back order to have an updated gas tube sent out to customer as a courtesy.  Once your Item has shipped, you will receive an additional email with tracking information from FedEx within 24hrs."  So, I take this to mean that I'm in the queue waiting for a part.  Go to this page and fill out the warranty repair request.
https://cz-usa.com/support/warranty/
Title: Re: 7.62x39 fix??
Post by: MeatAxe on April 19, 2022, 09:29:53 PM
Fortunately, since CZ itself has totally dropped the ball in this regard, HBI took the initiative to create a solution by drilling the proper-sized gas port at position #3 on your very own x39 gas tube and provides a stiffer piston spring. Though I haven’t needed or done it myself, from all reports, this fixes the FTE problem. Only concern is with the shipper losing your gas tube in transit, which, at this point is unobtainium.

https://hbindustries.net/store/shop/cz-bren-2-gas-regulator-service/
Title: Re: 7.62x39 fix??
Post by: RickLB on May 30, 2022, 03:55:08 PM
Yes.  I spoke with them recently.  I was told that the issue is going to be resolved by replacing the gas tubes.  They're different depending on the length.  The guy I spoke with said that I had to send in the rifle to have the gas tube replaced.  When I asked why not just send me the replacement gas tube, he said it's because they want to function test it and for liability reasons.  I told him that mine is a SBR to which he replied that there was an additional ATF form that I'd have to fill out.  I had to go to their website and fill out their RMA request form.  I was then emailed a FedEx call tag, but nothing about the ATF form.  So, I emailed back.  The person who responded said that I didn't have to send my SBR in and they'd just send me the gas tube when it arrives.  I received an email today stating "Changed incident type so that the firearm does not need to be sent in and created a back order to have an updated gas tube sent out to customer as a courtesy.  Once your Item has shipped, you will receive an additional email with tracking information from FedEx within 24hrs."  So, I take this to mean that I'm in the queue waiting for a part.  Go to this page and fill out the warranty repair request.
https://cz-usa.com/support/warranty/
.

You ever get your new gas tube?
Title: Re: 7.62x39 fix??
Post by: Bret on May 30, 2022, 10:39:34 PM
No.  I figured that I'd give it a couple of months and then call for an update.
Title: Re: 7.62x39 fix??
Post by: RickLB on May 31, 2022, 06:23:37 AM
Ok. Thanks
Title: Re: 7.62x39 fix??
Post by: alex33x on July 27, 2022, 11:05:53 AM
This is unfortunate, I don't feel like returning my Bren2 back to stock. HBI handguard, charging handle, upgraded spring, ACR Adapter and I had a guy do some work that made the FTE issue better but not fixed entirely. I wish they would just let us get the replacement or buy it. This is extremely inconvenient.
Title: Re: 7.62x39 fix??
Post by: RickLB on July 28, 2022, 08:58:43 AM
This is the response I got on 5/31/22

Please note that we are currently out of stock of replacement gas tubes, and due to the ongoing global supply chain issues causing delays with production it is unknown when more will arrive, though they are on order from the factory.
 
However we will process all requests in the order they were received as soon as the parts are available again. You should be contacted by our Customer Service department once this occurs to have your original gas tube sent in for an exchange to be done.
 
If you have any questions regarding this process, please contact our Customer Service department directly at info@cz-usa.com and we will do our best to assist you
 
Lucas Andrus
Gunsmith & Technical Support Supervisor
800-955-4486
lucas@cz-usa.com
Title: Re: 7.62x39 fix??
Post by: mig1nc on July 28, 2022, 11:09:25 AM
I would believe that explanation.

At work we are way behind on shipping product. Not firearms, but still....


Sent from my iPhone using Tapatalk Pro
Title: Re: 7.62x39 fix??
Post by: alex33x on July 28, 2022, 10:44:19 PM
This is the response I got on 5/31/22

Please note that we are currently out of stock of replacement gas tubes, and due to the ongoing global supply chain issues causing delays with production it is unknown when more will arrive, though they are on order from the factory.
 
However we will process all requests in the order they were received as soon as the parts are available again. You should be contacted by our Customer Service department once this occurs to have your original gas tube sent in for an exchange to be done.
 
If you have any questions regarding this process, please contact our Customer Service department directly at info@cz-usa.com and we will do our best to assist you
 
Lucas Andrus
Gunsmith & Technical Support Supervisor
800-955-4486
lucas@cz-usa.com

So if I understand this correctly, they will send the gas plug without you sending the gun?
Title: Re: 7.62x39 fix??
Post by: Bret on July 29, 2022, 09:11:30 AM
That’s what they told me they’d do after initially telling me that I had to send them the gun.
Title: Re: 7.62x39 fix??
Post by: Bret on August 09, 2022, 04:16:45 PM
I called today for an update.  They couldn't really give me a when, but did say that they're getting in parts and sending them out.
Title: Re: 7.62x39 fix??
Post by: MeatAxe on August 09, 2022, 07:45:59 PM
I called today for an update.  They couldn't really give me a when, but did say that they're getting in parts and sending them out.


Well, that’s become CZ USA’s standard non-answer for everything — to do nothing. “Yes, we’re going to fix such and such (that’s been an ongoing problem for a long, long time) — but we can’t tell you when.” I mean, this screwed up over-gassed x39 “regulator” problem has been going on for what? Four years now? And, as has become the usual, the parts inventory for the Bren 2 is basically non-existent.

Justice delayed is justice denied, because time is of the essence.
Title: Re: 7.62x39 fix??
Post by: RickLB on August 25, 2022, 06:33:46 PM
Email I received after asking for an update on 08/24/22

Quote
Good morning,
Unfortunately as you may be aware there are still ongoing delays with the global supply chain disruption affecting most companies around the world, including our own.

These parts are still on order and we will hopefully receive a batch from the factory soon. We will be contacting customers as soon as they arrive and I can confirm that you are on the list to be contacted.

Thank you,
Randal Stroud
Technical Support/Gunsmith Rifle Lead
1-800-955-4486
Title: Re: 7.62x39 fix??
Post by: MeatAxe on August 29, 2022, 06:14:08 PM
Good morning,

Unfortunately as you may be aware there are still ongoing delays with the global supply chain disruption affecting most companies around the world, including our own.

These parts are still on order and we will hopefully receive a batch from the factory soon. We will be contacting customers as soon as they arrive and I can confirm that you are on the list to be contacted.

Thank you,
Randal Stroud
Technical Support/Gunsmith Rifle Lead
1-800-955-4486
Same old bad news. I wonder how much longer CZ, and so many other companies, are going to trot out the old reliable “Because Covid / supply chain” excuse to cut back on parts and service and jack up prices? Five more years? It’s conceivable. We’re still feeling the effects of the “Because 9/11” excuse in the airline industry as an excuse for generally bad service, packed sardine seating and jacked up fares.

CZ still hasn’t fixed over-gassed gas regulators in the Bren 2 x39 going on 4 years now, which has a pretty simple solution. What was their excuse before Covid? Oh yeah, bad ammo. There were no spare parts then, either.

[Sir you will watch your language on this board !]
Title: Re: 7.62x39 fix??
Post by: Bret on August 29, 2022, 08:45:50 PM
At this point it's clear that they're choosing new production over fixing guns that their customers already have.  I'll never buy a newish model Sig again and it looks like I'll be doing the same for CZ.
Title: Re: 7.62x39 fix??
Post by: A_Bren_tobeatallothers on September 05, 2022, 05:52:53 AM
So I return years later to see CZ still has not fixed this issue? Good grief. I had an entire truck custom ordered and built and delivered in four months. I do not accept "supply chain" issues as an excuse. I'm going to to test fire mine today and see what it will do.  I lucked up I think, and found an ammo that seems to cycle well in my machine. Some Wolf. I don't remember specifics.
Title: Re: 7.62x39 fix??
Post by: MeatAxe on September 05, 2022, 12:50:34 PM
So I return years later to see CZ still has not fixed this issue? Good grief. I had an entire truck custom ordered and built and delivered in four months. I do not accept "supply chain" issues as an excuse. I'm going to to test fire mine today and see what it will do.  I lucked up I think, and found an ammo that seems to cycle well in my machine. Some Wolf. I don't remember specifics.


My 11” x39 hasn’t had any function issues (knock on wood), but it’s sitting collecting dust in the safe because I don’t dare shoot it lest it breaks some small part, because there are virtually no parts available from CZ USA.

The extractor has been zeroed in on as a possible cause or contributor to the x39 malfunctions — because they came from the factory filled with crud and swarf and with mangled extractor springs — good quality control, there, CZ!

I thought about disassembling the extractor and cleaning it out as preventative maintenance. But I don’t dare try that in case the extractor spring pops off into outer space…because there are no such parts available from CZ.

So the gun just sits because, as far as I know, it’s still (probably) functional in case I need to use it (I hope).
Title: Re: 7.62x39 fix??
Post by: Bret on September 08, 2022, 07:23:15 PM
Today I received a FedEx shipping notice from CZ-USA.  I have not purchased anything from them recently, so I'm hoping it's the gas valve.  The package weighs just one pound, so that's a good sign.  I'm keeping my fingers crossed.
Title: Re: 7.62x39 fix??
Post by: MeatAxe on September 08, 2022, 11:25:13 PM
Today I received a FedEx shipping notice from CZ-USA.  I have not purchased anything from them recently, so I'm hoping it's the gas valve.  The package weighs just one pound, so that's a good sign.  I'm keeping my fingers crossed.

Well, that’s interesting. Unless you have some special pull with CZ, as far as I’ve seen, the 7.62x39 gas tubes for the Bren 2 have never been listed or offered for sale on the CZ USA Webstore, nor even listed for notification when (if) they ever come into stock.

Let us know what you get! If you get the gas tube, please measure the sizes of the gas ports for us!
Title: Re: 7.62x39 fix??
Post by: Bret on September 09, 2022, 09:07:00 AM
I certainly have no special pull.  Perhaps they're not listing them for sale until all of the repair back orders are fulfilled.  I was already planning on measuring the gas port hole diameters.  I'll definitely let y'all know.
Title: Re: 7.62x39 fix??
Post by: America_First on September 09, 2022, 12:26:29 PM
I'll post it here like I've been posting everywhere else.

The gas regulator was never the issue.  Study the 807-trials & testing, and watch the early, Pakistani promotion videos.  The Bren 807 / Bren 2S / Bren 2Ms in 7.62x39 were always over-gassed, and normal ejection was 1 - 1:30, per the engineers who designed it.

My Bren 2S was used by HBI to solve the FTE issue, and was used in the creation of the HBI piston spring & suppressor gas-port sizing.  They found the problem, within a week, which was the ejector spring channels of the bolts, had metal shavings & debris left from the factory.  This caused the ejector springs to bind, not allowing the ejector to fully extend, and with the very over-gassed nature of the firearm; only highlighted the simple QC issue even further. 

Prior to HBI solving the issue with my firearm, and multiple others in their possession they used for testing, I couldn't fire a string of 5-rounds without an FTE. 

To date, I've fired over 2,500 rounds without an FTE, both suppressed & unsuppressed, brass cased & steel cased ammunition.  My Bren 2S still has the original, prototype piston spring, which the production spring was an improvement. 

Hopefully this has helped someone.  HBI did not release this info, in my opinion, because likely CZ-UB / CZ-USA did not have the capabilities of handling a mass recall with no spare parts on hand.  Just speculation, but likely not far off. 
Title: Re: 7.62x39 fix??
Post by: Bret on September 09, 2022, 01:46:01 PM
The gas regulator was never the issue.  Study the 807-trials & testing, and watch the early, Pakistani promotion videos.  The Bren 807 / Bren 2S / Bren 2Ms in 7.62x39 were always over-gassed, and normal ejection was 1 - 1:30, per the engineers who designed it.
Reliability aside, I'd say that over gassed is an issue.  Plus, mine and others that I've seen are not actually ejecting to 1:00 to 1:30.  The spent cases are hitting the rear of the ejection port or the case deflector and then going forward.  That points it to being over gassed resulting in too much bolt carrier velocity.  I can't see the logic behind them intentionally doing this.

Quote
My Bren 2S was used by HBI to solve the FTE issue, and was used in the creation of the HBI piston spring & suppressor gas-port sizing.  They found the problem, within a week, which was the ejector spring channels of the bolts, had metal shavings & debris left from the factory.  This caused the ejector springs to bind, not allowing the ejector to fully extend, and with the very over-gassed nature of the firearm; only highlighted the simple QC issue even further.
Is it difficult to remove the ejector and clean out the spring channels?  It's been so long since I've looked at mine I can't remember the setup.  I'd like to knock this out while I'm installing the new gas valve.

Quote
To date, I've fired over 2,500 rounds without an FTE, both suppressed & unsuppressed, brass cased & steel cased ammunition.  My Bren 2S still has the original, prototype piston spring, which the production spring was an improvement. 
This is very encouraging.  I really like this rifle, so I hope that I have your good fortune.  I definitely appreciate the insight.
Title: Re: 7.62x39 fix??
Post by: Bret on September 10, 2022, 03:27:01 PM
Here's the new gas valve.  There are three holes instead of two like the old gas valve.  The "normal" one is visually smaller than the normal one on the old valve.  Unfortunately, all of the holes are larger than my rod set.  All I can really say for sure is that all are greater than 0.060".  I did use calipers to compare the two normal size holes.  Obviously the measurement wouldn't be accurate, but I can say that the new gas valve normal hole is about 0.015" smaller than the old gas valve normal hole.

(https://i.postimg.cc/cHb7ZZ8F/New-gas-valve-right-view.jpg)
(https://i.postimg.cc/ZRRP1009/New-gas-valve-left-view.jpg)
Title: Re: 7.62x39 fix??
Post by: Bret on September 10, 2022, 04:17:57 PM
I disassembled the extractor from the bolt in order to see if there was any debris.  It was actually pretty clean in there, but the piece of rubber or whatever it is inside the extractor spring seems to be bulging out so much that portions of it are mashing out between the spring coils.  I actually cut a bit off because it was coming through so much.  I noticed a burr on another part that I don't know what it's for or what could have caused it.  It's shown in the final picture.  Any idea what that's about?

(https://i.postimg.cc/hvctvZQN/Bolt-disassembled.jpg)
(https://i.postimg.cc/L5D61kz5/Extractor-spring.jpg)
(https://i.postimg.cc/FH8F3HJy/Burr.jpg)
Title: Re: 7.62x39 fix??
Post by: MeatAxe on September 11, 2022, 11:45:52 AM
Here's the new gas valve.  There are three holes instead of two like the old gas valve.  The "normal" one is visually smaller than the normal one on the old valve.  Unfortunately, all of the holes are larger than my rod set.  All I can really say for sure is that all are greater than 0.060".  I did use calipers to compare the two normal size holes.  Obviously the measurement wouldn't be accurate, but I can say that the new gas valve normal hole is about 0.015" smaller than the old gas valve normal hole.

(https://i.postimg.cc/cHb7ZZ8F/New-gas-valve-right-view.jpg)
(https://i.postimg.cc/ZRRP1009/New-gas-valve-left-view.jpg)


Excellent!!! Maybe CZ is finally coming through with these! So, I take it you have a 7.62x39 Bren 2 with an 11” barrel? Let us know how this new gas tube works in your gun!

Yeah, the most accurate way to measure the gas port sizes is with a set of plug pin gauges. Hopefully, you can get your hands on a proper-size set and measure the old vs new gas port holes. Here’s a relatively inexpensive set for .061” up to .250”:

https://www.amazon.com/061-250-Steel-Minus-Gauges-Metal/dp/B00FW73VXO

I had measured the gas port hole sizes on my (so far functioning) 11” barrel x39 Bren 2Ms a while back:

https://czfirearms.us/index.php?topic=118773.0

Title: Re: 7.62x39 fix??
Post by: MeatAxe on September 11, 2022, 12:17:38 PM
I disassembled the extractor from the bolt in order to see if there was any debris.  It was actually pretty clean in there, but the piece of rubber or whatever it is inside the extractor spring seems to be bulging out so much that portions of it are mashing out between the spring coils.  I actually cut a bit off because it was coming through so much.  I noticed a burr on another part that I don't know what it's for or what could have caused it.  It's shown in the final picture.  Any idea what that's about?

(https://i.postimg.cc/hvctvZQN/Bolt-disassembled.jpg)
(https://i.postimg.cc/L5D61kz5/Extractor-spring.jpg)
(https://i.postimg.cc/FH8F3HJy/Burr.jpg)


Interesting! My 11” x39 Bren has not had any function issues (knock on wood), but I don’t dare disassemble the extractor lest I break or lose any of the parts, which of course, the spares are non-existent from CZ. If it ain’t broke, don’t fix it, so my gun sits collecting dust, awaiting access to spare parts.
Title: Re: 7.62x39 fix??
Post by: Bret on September 13, 2022, 06:53:06 PM
I ordered a different pin gauge set to match the smaller one that I already have.  It should be here next week.
Title: Re: 7.62x39 fix??
Post by: Bret on September 18, 2022, 10:46:12 PM
I received my pin gauge set and measured the holes in the gas valves.  The results are below.

Old gas valve:
Normal = 0.075"
Adverse = 0.097"

New gas valve:
Normal = 0.063"
Adverse 1 = 0.071"
Adverse 2 = 0.087"

Unfortunately, I can't try it next weekend, but I will as soon as I can using the same ammunition I used before. 
Title: Re: 7.62x39 fix??
Post by: MeatAxe on September 19, 2022, 01:21:06 AM
I received my pin gauge set and measured the holes in the gas valves.  The results are below.

Old gas valve:
Normal = 0.075"
Adverse = 0.097"

New gas valve:
Normal = 0.063"
Adverse 1 = 0.071"
Adverse 2 = 0.087"

Unfortunately, I can't try it next weekend, but I will as soon as I can using the same ammunition I used before.

Awesome! Thanks for posting that! Let us know how it shoots when you get a chance.

I got the same measured results on my original 2 position gas tube (we both have 11” bbl. 7.62x39 Brens).

Good to see that CZ is finally addressing the over-gassing issue and is narrowing the gas ports accordingly. Hope CZ starts making this revised 3 position gas tube available to all of us soon.

Still would be good to know what size hole HBI is drilling their 3rd position gas port to, by comparison, so if anyone has that info, please post it.

Title: Re: 7.62x39 fix??
Post by: Bret on October 08, 2022, 09:41:06 PM
I shot my Bren 2Ms today and had pretty good results with the new gas valve.  150rds of Tula 122gr FMJ copper jacket and 45rds of Golden Tiger 124gr FMJ were put through the rifle.  It's setup to use 7.62x39 AR15 magazines.  I used a 30rd D&H, a 20rd ASC and a RZE Unimag.  Immediately, I could tell that the cases were ejecting with less velocity.  Ejection was generally from 1:30 to 2:00 and the cases went only about 4'.  Slo-mo video showed that the cases were actually deflecting off of the case deflector and then going to 1:30 to 2:00.  I did have an issue when using the RZE Unimag.  Both times I attempted to shoot 25rds though it, the BCG locked back when the 3rd cartridge was feeding.  It turns out that the cartridges in the magazine were nose diving and the base of the top cartridge was stopping the bolt carrier in its tracks.  It's interesting that this happened on the 3rd cartridge each time and didn't repeat while shooting further through the magazine.  Though I have had great success using the Unimags in other 7.62x39 rifles, I can't blame the CZ Bren which wasn't actually even designed to use 7.62x39 AR15 magazines.  Rather, it was designed to use their proprietary continuous curve 7.62x39 magazines.  Given that the problem didn't occur with the D&H nor ASC magazines, I'm just going to avoid using the Unimags in this rifle.  I'll obviously put some more ammunition through this rifle before I'm confident, but I feel like it's on the right path.  Below is a picture of the jam when using the Unimag.  The arrow points to the base of the cartridge that caused the stoppage.
(https://i.postimg.cc/BbZJxyFx/Cartridge-base-causing-BCG-to-stop-in-Bren-2-Ms-with-Unimag.jpg)
Title: Re: 7.62x39 fix??
Post by: Bret on October 24, 2022, 09:33:49 AM
Yesterday I fired 20rds of Tula 122gr FMJ copper jacket using an ASC 20rd magazine and 30rds more of the same using a D&H 30rd magazine.  The rifle functioned 100% with ejection to about 1:00.  Spent cases are hitting off of the case deflector and going back forward.  A few hit my left hand as it was gripping the handguard.  I think the over gassing issue is solved, but there's still an issue with the ejection direction.  I understand that the case deflector is supposed to deflect spent cases that are heading too far rearward, but they're hitting it square and going back forward.  A different shape to the case deflector would help, but I'm still left thinking that there is some sort of ejection timing issue. 
Title: Re: 7.62x39 fix??
Post by: America_First on October 25, 2022, 05:31:13 PM
Yesterday I fired 20rds of Tula 122gr FMJ copper jacket using an ASC 20rd magazine and 30rds more of the same using a D&H 30rd magazine.  The rifle functioned 100% with ejection to about 1:00.  Spent cases are hitting off of the case deflector and going back forward.  A few hit my left hand as it was gripping the handguard.  I think the over gassing issue is solved, but there's still an issue with the ejection direction.  I understand that the case deflector is supposed to deflect spent cases that are heading too far rearward, but they're hitting it square and going back forward.  A different shape to the case deflector would help, but I'm still left thinking that there is some sort of ejection timing issue. 

Quick question, are you using the HBI piston spring? 
Title: Re: 7.62x39 fix??
Post by: Bret on October 25, 2022, 06:28:37 PM
Quick question, are you using the HBI piston spring?
Yes.  Why do you ask?
Title: Re: 7.62x39 fix??
Post by: America_First on October 26, 2022, 04:19:42 PM
Then there's likely another issue causing erratic or delayed ejection.  Have you cleaned the ejector spring channel in the bolt? I noticed some images of the extractor removed, which is what we originally thought the issue was back in 2020. 

If CZ-USA offered spare bolts, this would be such an easy fix.  That's really all we want, is a SPARE BOLT!  How difficult could this be for a manufacture like CZ-UB?
Title: Re: 7.62x39 fix??
Post by: Bret on October 26, 2022, 04:38:41 PM
I removed the extractor from the bolt, but not the ejector.  I'll give it a look.
Title: Re: 7.62x39 fix??
Post by: MeatAxe on October 26, 2022, 07:27:57 PM
I removed the extractor from the bolt, but not the ejector.  I'll give it a look.

Whatever you do, don’t lose any of the ejector and extractor parts. CZ Bren 2 parts are as rare as hens’ teeth — especially such critical wear / replacement parts. I’ve been trying to accumulate such bolt parts for years (literally) so I’d have replacements in case any of those parts were to spring into outer space while disassembling the bolt.

There’s really no excuse for CZ not supporting the Bren 2. And now we’re hearing that CZ plans to stop importing the Bren 2 to the US, at least temporarily? Ridiculous.
Title: Re: 7.62x39 fix??
Post by: mig1nc on October 27, 2022, 07:06:13 AM
I removed the extractor from the bolt, but not the ejector.  I'll give it a look.

Whatever you do, don’t lose any of the ejector and extractor parts. CZ Bren 2 parts are as rare as hens’ teeth — especially such critical wear / replacement parts. I’ve been trying to accumulate such bolt parts for years (literally) so I’d have replacements in case any of those parts were to spring into outer space while disassembling the bolt.

There’s really no excuse for CZ not supporting the Bren 2. And now we’re hearing that CZ plans to stop importing the Bren 2 to the US, at least temporarily? Ridiculous.
Do you have a source for that info?


Sent from my iPhone using Tapatalk Pro
Title: Re: 7.62x39 fix??
Post by: America_First on October 27, 2022, 12:52:48 PM
I removed the extractor from the bolt, but not the ejector.  I'll give it a look.

Whatever you do, don’t lose any of the ejector and extractor parts. CZ Bren 2 parts are as rare as hens’ teeth — especially such critical wear / replacement parts. I’ve been trying to accumulate such bolt parts for years (literally) so I’d have replacements in case any of those parts were to spring into outer space while disassembling the bolt.

There’s really no excuse for CZ not supporting the Bren 2. And now we’re hearing that CZ plans to stop importing the Bren 2 to the US, at least temporarily? Ridiculous.

100% AGREE with every word said here. 

HBI created a video that went through the entire disassembly process, which was never released publicly.  The difficulty isn't in the disassembly, it's in the fact that if you lose or damage any component, there is no spare parts to replace them with.  Literally, an ejector spring that costs CZ-UB $0.10 cents or less to manufacture is non-existent.  There is no excuse. 
Title: Re: 7.62x39 fix??
Post by: MeatAxe on October 27, 2022, 02:33:17 PM
100% AGREE with every word said here. 

HBI created a video that went through the entire disassembly process, which was never released publicly.  The difficulty isn't in the disassembly, it's in the fact that if you lose or damage any component, there is no spare parts to replace them with.  Literally, an ejector spring that costs CZ-UB $0.10 cents or less to manufacture is non-existent.  There is no excuse.
Yeah, right now my Bren 2 is functional and not jamming, but it just sits in the safe collecting dust. I don’t dare shoot it or disassemble the small parts because if anything breaks or gets lost, my Bren 2 is just an oversized paper weight — until such time (if ever) that CZ deigns to support these guns.
Title: Re: 7.62x39 fix??
Post by: MeatAxe on October 27, 2022, 03:11:57 PM

Do you have a source for that info?



They’ve been talking about it on ARFCOM, apparently sources from former CZ USA employees getting laid off (not a good sign, especially if Colt is taking over). Also was on a recent Patreon-only video on MAC where he mentioned that rumor — along with discouraging people from buying the Bren 2, with a lot of justification considering the cost, problems, lack of support and lackluster accuracy.
Title: Re: 7.62x39 fix??
Post by: Bret on November 27, 2022, 04:21:52 PM
I took my 11" Bren2 Ms out again today and put 90rds through it.  Ejection is weird.  Half of the spent cases go to about 12:30 and the other half go to about 2:30.  There was one stovepipe on a spent case where the following cartridge fed into the chamber.  My guess is that the spent case hit off the rear of the ejection port, bounced forward and was caught by the bolt carrier going forward.  This is so frustrating because the ergonomics and light weight of this rifle make it feel great in my hands.

(https://i.postimg.cc/CLKKppGv/Bren-2-Ms-stove-pipe-112722.jpg)
 
I removed the ejector.  Its channel appears clean.  The only oddity that I found was a little ring that was around the part that the arrow points to.  I can't really tell if it's metal or rubber.

(https://i.postimg.cc/52PsBrQz/Bren-2-Ms-ejector-disassembled-112722.jpg)
Title: Re: 7.62x39 fix??
Post by: MeatAxe on November 28, 2022, 07:46:30 AM
I took my 11" Bren2 Ms out again today and put 90rds through it.  Ejection is weird.  Half of the spent cases go to about 12:30 and the other half go to about 2:30.  There was one stovepipe on a spent case where the following cartridge fed into the chamber.  My guess is that the spent case hit off the rear of the ejection port, bounced forward and was caught by the bolt carrier going forward.  This is so frustrating because the ergonomics and light weight of this rifle make it feel great in my hands.

(https://i.postimg.cc/HkTN45Sq/cid-DE77-E37-B-242-C-4230-96-E6-12-A9476-F79-FF.jpg)
 
I removed the ejector.  Its channel appears clean.  The only oddity that I found was a little ring that was around the part that the arrow points to.  I can't really tell if it's metal or rubber.

(https://i.postimg.cc/52PsBrQz/Bren-2-Ms-ejector-disassembled-112722.jpg)


That is indeed odd — there is no “O” ring or anything similar shown with the ejector on the official Bren 2 parts schematic. I don’t recall seeing one on the couple of spare ejectors I’ve been able to (sporadically) acquire from the CZ USA Webstore.

Does it eject / cycle better without the O ring?
Title: Re: 7.62x39 fix??
Post by: Bret on November 28, 2022, 04:45:49 PM
It's still taken apart, so I don't know.  I can't figure out why they made the spring so long.
Title: Re: 7.62x39 fix??
Post by: Bret on December 08, 2022, 08:37:16 PM
That little circular piece sticks to a magnet, so it’s steel. I think it’s the end of the spring that broke off.
Title: Re: 7.62x39 fix??
Post by: MeatAxe on December 09, 2022, 07:41:31 AM
That little circular piece sticks to a magnet, so it’s steel. I think it’s the end of the spring that broke off.

There’s no telling where that mangled ring came from — but whatever it is, it ain’t supposed to be there. Bren 2 owners are reporting all kinds of crud and swarf in their ejector channels, direct from the factory. Good quality control, there, CZ!!

From the two spare ejection springs I’ve been able to acquire from CZ over the years, yours appears to be more or less intact, though maybe somewhat knackered on my the one end where it’s double wound. Hopefully, you’ve discovered and removed the source of your ejection woes and hopefully you can get some fresh replacement parts…assuming you can navigate CZ’s crappy online Webstore.

It’s just a totally ridiculous situation with CZ and their lack of parts and service for these guns.
Title: Re: 7.62x39 fix??
Post by: Bret on December 09, 2022, 09:53:45 AM
I'm going to call them and offer to send a picture.  We'll see what that brings me.
Title: Re: 7.62x39 fix??
Post by: Bret on December 12, 2022, 11:10:34 AM
I received an email stating that an extractor spring and an ejector spring would be sent out.  :)
Title: Re: 7.62x39 fix??
Post by: Bret on February 02, 2023, 03:16:42 PM
I didn't receive the springs.  I emailed twice more but received no response.  So, I called today.  The lady that I spoke with said they had no record of my email address.  >:(  She gave me her email address and I forwarded the email chain to her.  She said that she'd put in an order for the replacement springs, but that it will likely be a while because they have not received Bren replacement parts in eight months.  I pointed out that they sent me a replacement gas valve a few months ago.  She said that they got a weird shipment of 40 and sent them out to people who had requested them.  All this to say that it looks like I'm back to waiting.
Title: Re: 7.62x39 fix??
Post by: MeatAxe on February 02, 2023, 05:06:58 PM
I didn't receive the springs.  I emailed twice more but received no response.  So, I called today.  The lady that I spoke with said they had no record of my email address.  >:(  She gave me her email address and I forwarded the email chain to her.  She said that she'd put in an order for the replacement springs, but that it will likely be a while because they have not received Bren replacement parts in eight months.  I pointed out that they sent me a replacement gas valve a few months ago.  She said that they got a weird shipment of 40 and sent them out to people who had requested them.  All this to say that it looks like I'm back to waiting.

So the excuse is that all of CZ’s Bren 2 production and parts thereof are going to fight Putin in the Ukraine…here’s an idea: now that CZ has taken over Colt (or vice versa as the case may be) why not send the Ukraine thousands of Colt M4s with all their stockpile of parts and accessories (and allow Colt to possibly finally support itself) and have CZ send adequate Bren 2 parts and inventory back to the US to serve the large and lucrative civilian market? (Or better yet, start Bren 2 production in the US, though we know Colt management has probably already killed all CZ manufacturing in the US.)

That would be a win / win for both Colt and CZ, especially since nobody wants Colt’s M4, especially with the Sig Spear on the horizon.
Title: Re: 7.62x39 fix??
Post by: Bret on April 12, 2023, 10:34:18 PM
I received a replacement extractor spring a few days after my post above, but didn't receive the ejector spring that I need.  Sunday I sent them an email asking for an update regarding when I'll receive the ejector spring.  Today I received a package from CZ.  I was thinking that I was finally going to be able to get it running again.  Unfortunately, when I opened the package I found an extractor and nothing else.  I have no idea why they sent me an extractor.  It's nice to have I guess, but is obviously not an ejector spring.  I sent them another email...
Title: Re: 7.62x39 fix??
Post by: RickLB on April 13, 2023, 05:31:47 AM
It’ll be a long time before I ever buy a CZ product again. Their responses to my emails have been vague and I haven’t received any parts from them . I hear people complain and Morgan about H&K but their customer service so far for me has been outstanding not the same with CZ
Title: Re: 7.62x39 fix??
Post by: Wobbly on April 13, 2023, 07:30:10 AM
It’ll be a long time before I ever buy a CZ product again. Their responses to my emails have been vague and I haven’t received any parts from them .


"People of action use the phone." That was the lesson from my first management class.

Invariably, the slowest or newest employees are saddled with answering the emails, because quite frankly most of the thousands of emails received are mind-numbingly stupid questions like "what time to do you open?" or "how do I order parts?"

Yes, frequently you'll see a job ad that says send your resume to "this email address", and a specific address is given. But don't confuse that to mean that ALL emails are opened, read, or treated as important. Especially with the advent of smart phones. It's far too easy to send a message that's of no more important than a text. (And we won't even talk about the amount of spam a big company receives.)

Yes, some companies will respond, but in no way should that be extrapolated to mean that ALL companies consider ALL emails an important form of communication. Email has no more value to the average small business than junk mail. So maybe, just maybe, it's not the receiver's fault.

Just my 2 cents.
Title: Re: 7.62x39 fix??
Post by: RickLB on April 13, 2023, 07:39:44 AM
I can agree to a point but if they aren’t answering emails that they previously answered and won’t return calls then what are you to do?
Title: Re: 7.62x39 fix??
Post by: Wobbly on April 13, 2023, 07:54:03 AM
I can agree to a point but if they aren’t answering emails that they previously answered and won’t return calls then what are you to do?

How about... don't buy the item to begin with.

Especially not in the middle of Europe's biggest land war in 75 years.
Title: Re: 7.62x39 fix??
Post by: RickLB on April 13, 2023, 08:06:56 AM
A bit late for that and I bought it before the war so……
Title: Re: 7.62x39 fix??
Post by: MeatAxe on April 13, 2023, 09:38:14 AM
A bit late for that and I bought it before the war so……


At the time, pre covid, pre Taliban surrender and pre-Ukraine, the Bren 2 SEEMED like a better alternative to the AR15. And it’s still a great gun…potentially. However, with near zero parts and customer support, I would advise buying something else: say a Rob Arms XCR, or a PWS
. PSA JAKL, PSA ks 47
Title: Re: 7.62x39 fix??
Post by: Bret on April 13, 2023, 09:58:15 AM
A bit late for that and I bought it before the war so……
Same here.    :(
Title: Re: 7.62x39 fix??
Post by: Wobbly on April 13, 2023, 10:56:55 AM
It’ll be a long time before I ever buy a CZ product again. Their responses to my emails have been vague and I haven’t received any parts from them.

A bit late for that and I bought it before the war so……

And maybe, just maybe, selling this gun in the USA also sounded like a great idea to the people at CZ... before the war started !!

 :o
Title: Re: 7.62x39 fix??
Post by: mig1nc on April 13, 2023, 03:49:38 PM
A bit late for that and I bought it before the war so……


At the time, pre covid, pre Taliban surrender and pre-Ukraine, the Bren 2 SEEMED like a better alternative to the AR15. And it’s still a great gun…potentially. However, with near zero parts and customer support, I would advise buying something else: say a Rob Arms XCR, or a PWS
. PSA JAKL, PSA ks 47
It’s a heck of a lot lighter than an XCR.
Title: Re: 7.62x39 fix??
Post by: Bret on April 13, 2023, 04:46:01 PM
It’s a heck of a lot lighter than an XCR.

I agree and it overall handles better as a result. The XCR is more reliable in 7.62x39 and is easier to change cartridges.
Title: Re: 7.62x39 fix??
Post by: MeatAxe on April 13, 2023, 09:24:47 PM
It’s a heck of a lot lighter than an XCR.


The XCR has an aluminum lower and usually a stout aluminum folding stock as opposed to those plastic parts on the Bren 2. In addition the XCR has multiple options for barrel length / profile and extended upper receiver lengths which will have an effect on it’s weight, plus or minus. But those are all great options, that the Bren 2 doesn’t really offer.

In addition, the XCR has easily interchangeable barrels and caliber swaps, and optional pistol grips as well as multiple gas settings, which the Bren 2 does not have (which probably would have avoided the malfunctioning problems on the x39 Bren 2s). So in that sense, the XCR is light years ahead of the Bren 2.

In addition, “boutique” manufacturer Rob Arms actually has spare parts available for the XCR, which, by and large, the Bren 2 does not have from CZ.

I’ll give you that the Bren 2 pistol is light and handy and would make a good backpack gun, but accuracy is mediocre.