cz 40b issues

[jdcanter13]

Hey all,

I keep coming back here cause you guys are so helpful.

I just got this used Cz 40b for 400 bucks. I couldnt pass up the opportunity. I took it to the range today. The issue I had today will be hard to explain so bare with me.

When firing, it felt like the slide was very slow chambering the next round. You could literally feel the slide pull back and try feeding the next round. This would,  not in all cases, cause a jam or it would just continue to fire normally. I've tried all types of ammo. I have no idea what it is.

Otherwise it's an awesome gun and i hope to get this issue resolved.

Thanks for looking y'all.

[Armor Snail]

Did you strip, clean, and lube it?

Give that a shot. 
I would disassemble the mags and clean them too.  No lube though.

[Birds Away]

I agree with stripping, cleaning and lubing it.  You may have to invest in a new recoil spring.  That would be my first guess.

[AZ_CZ]

Sounds like a glitch in the Matrix.






Or the other stuff. How far is your brass ejecting (when it does)? If it's landing next to you get a new recoil spring.

[jdcanter13]

Sounds like a glitch in the Matrix.

Or the other stuff. How far is your brass ejecting (when it does)? If it's landing next to you get a new recoil spring.

The brass was ejecting far, farther than my other CZ's

 

I agree with stripping, cleaning and lubing it.  You may have to invest in a new recoil spring.  That would be my first guess.

I cleaned it right before the range. Someone else told me the recoil spring. Do they still make a 40b spring?

[jdcanter13]

Also, looking at the 40b from the side, I noticed this: http://s29.postimg.org/fcyi7myp3/DSC_0143.jpg
It's a hole on the side of the slide that is right below the rear sight.
Is that hole supposed to be there or is there a pin that fills that hole? It just doesn't seem like that would affect the problem I'm having.

Thanks again for all your help guys.

[JamesR]

Hey all,

I keep coming back here cause you guys are so helpful.

I just got this used Cz 40b for 400 bucks. I couldnt pass up the opportunity. I took it to the range today. The issue I had today will be hard to explain so bare with me.

When firing, it felt like the slide was very slow chambering the next round. You could literally feel the slide pull back and try feeding the next round. This would,  not in all cases, cause a jam or it would just continue to fire normally. I've tried all types of ammo. I have no idea what it is.

Otherwise it's an awesome gun and i hope to get this issue resolved.

Thanks for looking y'all.

JDCanter,

I've had the EXACT same problem on my CZ40P (not a "B".) I think if you go back far enough in the threads you'll find the discussion surrounding my problem. Many folks were helpful, but I never really got a resolving answer.

To be fair, I never real had that many jams, if any, because of it. The only 3 or 4 failure to feeds were due to ammo brands - my gun doesn't like bullets with larger flat areas on the nose. The Winchester White box 170 gr. (I think) and smaller flats work flawlessly in it. I mention this only because your jams and your "slow return to battery" (which is what other folks called it when I asked them about it) may possibly be separate issues.

I've come to the conclusion that my slow or "lazy action" (which is what I call it) is magazine related, at least with my gun. Why? The one original mag that I have for the gun has worked flawlessly (when proper functioning ammo is used.) The Mecgar 12 round magazines that I bought on other folks' recommendations are the mags that I have the problem with. I got another non-original mag that came with the gun (which I bought slightly used) but I don't know how it works. Never used it because it didn't seem to cycle as well as the others.

Also, for me, the problem only comes about when the gun is warmed up I don't experience the issue with any mag until I've fired 20 rounds or so. So check the mags to see if they're original and see if the problem happens only after you've been shooting awhile.

[motom]

JD,

That hole is for the firing pin retaining pin.  Get a solid one from CGW or the custom shop.

Tom

[netmindr]

JD,

That hole is for the firing pin retaining pin.  Get a solid one from CGW or the custom shop.

Tom

This is a roll pin which is just a flat piece rolled up to form the pin. That's why there is a hole in it. This is normal, but I agree with motom, get the solid replacement pin.

BTW, when replacing it, it is designed to only come out from right to left and back in the opposite.

You are correct in that it should not affect cycling.

If it's throwing brass that far, the recoil spring could be weak and not able to strip off and chamber the next round with enough force. That would be a good place to start. What about the nylon bushing around the spring? Some wear is normal, but does it look overly chewed up?

[jdcanter13]

JD,

That hole is for the firing pin retaining pin.  Get a solid one from CGW or the custom shop.

Tom

This is a roll pin which is just a flat piece rolled up to form the pin. That's why there is a hole in it. This is normal, but I agree with motom, get the solid replacement pin.

BTW, when replacing it, it is designed to only come out from right to left and back in the opposite.

You are correct in that it should not affect cycling.

If it's throwing brass that far, the recoil spring could be weak and not able to strip off and chamber the next round with enough force. That would be a good place to start. What about the nylon bushing around the spring? Some wear is normal, but does it look overly chewed up?

Thanks for this. I see the tiny piece now. Also I don't notice any nylon bushing in my 40b. I just bought some recoil springs from Wolff so we will try those out.

Someone at a gun range looked at the current recoil springs and said it was tiny for a 40sw caliber. Taking his word for it.

Sent from my C6806 using Tapatalk

[motom]

JD,
As far as I know only the 40P had the bushing.  If you ordered the full size 75B recoil springs you will have to shorten them to use in the 40B. Here's a link to a thread that may help, especially the quote in post #5. http://www.czfirearms.us/index.php?topic=5475.0

I currently have an 18# spring in mine but my next order to Wolff I will try a 20# and 22#.

Also, when I first got my lightly used 40B the slide stop spring had very little tension and needed tweaking, after that it's been 100%.

Tom

[jdcanter13]

JD,
As far as I know only the 40P had the bushing.  If you ordered the full size 75B recoil springs you will have to shorten them to use in the 40B. Here's a link to a thread that may help, especially the quote in post #5. http://www.czfirearms.us/index.php?topic=5475.0

I currently have an 18# spring in mine but my next order to Wolff I will try a 20# and 22#.

Also, when I first got my lightly used 40B the slide stop spring had very little tension and needed tweaking, after that it's been 100%.

Tom

Tom,

I actually bought a CZ 75 Compact spring, 18lb and 20lb.
The 18lb was better, it was only felt with cheaper ammo. I stuck the 20lb spring in and I had no FTE, FTF, and no slide issues.

Thanks for all your help guys. The CZ 40B is the best CZ I have had so far! Next step will be a CZ 97 B.

[jdgray]

I used a full size 20# spring, and trimmed coils until coil bind was gone. Works perfect! I had a weird feeling on recoil, that the slide was banging the frame on the end of the recoil stroke, but now its gone. Its very hard to rack the slide now, but that I can deal with.

[wtburnette]

So, I have two 40P's, one that has been cajunized and one that is completely stock.  Both have the "lazy action" problem mentioned in this thread.  I see the most common fix for this is to get a 20lb Wolff recoil spring.  I've heard that the 40P can use a 75B spring that has been cut down, or a 75 Compact spring.  My question is, does the 75 Compact spring need to be cut down, or does it fit correctly?  I'd much rather do that and avoid cutting the spring, if possible.  If it works for one of the guns, I'm guessing it should address the issue for the other gun as well (at least I hope so).