CZ 75 Compact - intermittent failure for the hammer to fall w/Trigger Pulled

[Barth]

Hello Everyone,
I have a new CZ 75 Compact.
Am experiencing intermittent failure for the hammer to fall
when the trigger is pulled, hammer is cocked, and safety is off (~ 1/100 rounds).
Gun will run fine for ~100 rounds.
Then in the middle of a mag, will strip/eject the spent round, cycle feeding and chambering the next round,
fully return to battery - and not fire when the trigger is pulled.     
Can then pull back the slide, eject that round, load the same round back in the mag,
drop the slide and shoot that round.
Then it will run fine for around 100 rounds and do it again.
I want to love this gun, but just don't trust it.

Now I'm feeling like I'm Behind the Eightball.
I think the gun was doing this out of the box, but I blew it off as break-in.
Then had CGW Short Reset kit, Race Hammer and adjustable sear installed.
Not sure CGW parts are to blame, but they are already in the gun now.
CGW didn't install the parts, had a local gunsmith do that.
Hard to blame the LGS and they are not CZ experts anyway.
Was going to have CZ Custom install CGW parts in the first place.
But didn't think they would do it (conflict of interest).

I've never seen or heard of a gun malfunctioning like this.
Sure doesn't sound like break-in to me.
Gun timing, hammer / sear fitment, IDK.

Feel like I really need a CZ expert gunsmith and don't what to ship the thing to CGW.
So, I went to CZ Custom (local) and as I anticipated they will not install or repair CGW parts.
They, naturally, recommended removing CGW and replacing with CZ Custom.
CGW parts will be removed and replaced with CZ Custom Carry / Duty Hammer, extended firing pin, reduced weight FPS/HS. 
I want this gun to work so bad that I went for it and the work is being done as we speak.

Thoughts?

[Hog Driver]

I've had that happen when I've gotten the trigger overtravel screw extended too far. There has to be a finite amount of overtravel or the sear may not release every time. Easy fix if that's all it is. In my limited experience, I've never had a CZ need "breaking in", especially with CGW parts.

[MeatAxe]

Hello Everyone,
I have a new CZ 75 Compact.
Am experiencing intermittent failure for the hammer to fall
when the trigger is pulled, hammer is cocked, and safety is off (~ 1/100 rounds).
Gun will run fine for ~100 rounds.
Then in the middle of a mag, will strip/eject the spent round, cycle feeding and chambering the next round,
fully return to battery - and not fire when the trigger is pulled.     
Can then pull back the slide, eject that round, load the same round back in the mag,
drop the slide and shoot that round.
Then it will run fine for around 100 rounds and do it again.
I want to love this gun, but just don't trust it.

Now I'm feeling like I'm Behind the Eightball.
I think the gun was doing this out of the box, but I blew it off as break-in.
Then had CGW Short Reset kit, Race Hammer and adjustable sear installed.
Not sure CGW parts are to blame, but they are already in the gun now.
CGW didn't install the parts, had a local gunsmith do that.
Hard to blame the LGS and they are not CZ experts anyway.
Was going to have CZ Custom install CGW parts in the first place.
But didn't think they would do it (conflict of interest).

I've never seen or heard of a gun malfunctioning like this.
Sure doesn't sound like break-in to me.
Gun timing, hammer / sear fitment, IDK.

Feel like I really need a CZ expert gunsmith and don't what to ship the thing to CGW.
So, I went to CZ Custom (local) and as I anticipated they will not install or repair CGW parts.
They, naturally, recommended removing CGW and replacing with CZ Custom.
CGW parts will be removed and replaced with CZ Custom Carry / Duty Hammer, extended firing pin, reduced weight FPS/HS. 
I want this gun to work so bad that I went for it and the work is being done as we speak.

Thoughts?

This is a brand new gun?

Did you thoroughly clean all the cosmoline / packing grease out of it before you started shooting? And I mean thoroughly, because CZ pistols come from the factory swimming in packing grease, which is NOT a lubricant. You’d be surprised how many people don’t clean their new CZ pistols and then start having function issues right off the bat. I take a new gun and immerse it in a bucket of Hoppes #9 overnight or longer to dissolve all that crud before I lube and shoot it.

That’s the first thing I would do before changing out for custom parts. CZ75 compacts shoot pretty bleep well out of the box (as long as you clean them thoroughly) and their stock triggers wear in pretty nicely.

[armoredman]

Odd indeed. I am one of those that shot a CZ pistol still with the shipping grease, and it ran like a champ, (P-01, MANY years ago), but that WAS stupid. I see you went to CZ Custom, (hey, you ain't to far from me!), and I'll bet you talked to Stuart. He and the rest of that crew can really help you out. Just leave it in their capable hands, and you will get a perfect little blaster.

[MeatAxe]

It is spanking new.
I always field strip and clean/lube any new gun before shooting.
This gun was oiled, but didn't seem to be covered in cosmoline / packing grease?
I just used Ballistol on the barrel and Militech 1 on the rails.
After a few hundred rounds out of the box (does have a good factory DA/SA). 
I had Scottsdale Gun Club LGS perform an action job and install CGW parts.
Then ~400 more rounds with the intermittent failures described.
Now it's currently at CZ Custom getting a second trigger job, removing CGW parts
and adding their Carry / Duty hammer, extended firing pin and reduced power FPS/HS.
I described the malfunction in writing to CZ Custom for repair as part of this work.
Currently waiting on CZ Custom to complete this work.   

So now you’ll have two custom jobs on your new CZ? One from CGW by way of Scottsdale Gun Club and now one from CZ Custom? That’s gonna be expensive before you even get the gun “broken in.”

You could well have a lemon, but it’s  usually more cost and time effective to thoroughly clean your gun of its preservative first, like I said (not just field strip clean it) and then shoot 500 rounds or more through it to determine what deficiencies your gun might have (if any) before you send it off to CGW  or CZ Custom — I think I’d send it back to the mothership at CZ USA first for warranty repairs if needed. If they are needed, they might just send you a new pistol.

[armoredman]

I haven't had any dealings with Snotsdale Gun Club in a LONG time, but they didn't impress me much last time I was there, MANY years ago. CZC will make things right.

[terry mc]

I am sure you will love it when it is sorted.
I have had a lot of stuff from CZC and CGW and neither have given me an issue.
Both great companies.

I second it sounded like an overtravel screw preventing the sear from disengaging.
if they do not get blue locktite they will work in and out slightly causing the gun to work most times but have an occasional hang-up.
The other one is the adjustable sear for the CGW kit, if they did not blue locktite that it will cause issues, mainly with safety function.

Sorry for getting to you, after you dropped off at CZC as I am local as well and would have gladly looked at it before you spent money on undoing what you have already done.

[M1A4ME]

The CZ75 Compacts are great pistols.  I have doubles of several CZ models but the CZ75 Compact is the only one I have 3 of.

I carried my modified CZ75 Compact often enough to wear the finish off the safety, the slide release and the areas of the muzzle end of the slide. 

I bought one for my wife.  She shot it so well her XDM 9MM 3.8" pistol got moved to the safe.  So I bought a CZ75 Compact for me.  She shot it one day and it shot better groups than the one I bought her so it became hers and her gun went into the safe.  I had to buy the 3rd one for me so I could do a project on it. 

I'll bet you'll really like it when you get it back.

You can buy 16 round magazines for them.  Or buy the full size CZ75 mags and the adaptor floor plate for the 16 round magazine to use with the Compact model pistols.  Looks good, add a little to the bottom of the grip surface for your pinky finger if your hand is big enough to need it.

You can find those at Greg Cote, LLC.

https://gregcotellc.com/cart/cz-factory-mecgar-actmag-c-173/cz-75-compact-cz-pcr-cz-p01-cz-shadow-2-compact-9mm-16-rd-magazine-kit-mecgar-mgcz7516bcz0430177001-p-1639.html

Looks like this on the pistol.

My two P01 Omegas.  Top one has the 16 round mags.  Bottom one has the 14 round mags. that used to come with the Compact sized pistols.

[Jdk]

Just to clarify, it ran fine out if the box, but developed issues after the CGW's parts install?  If so, than its either the parts or the install, but the installation isn't too hard for anyone with access to YouTube and some basic tools.  The CGW parts are very high quality, but the guns aren't Glocks or ARs.  There may be some fitting or tinkering required.

Also, can you describe the problem in a little more detail?  Maybe I'm confused, but I believe you described it as a "dead trigger."  Did it fail to reset?  Meaning, it didn't engage the hammer at all?   I'm dealing with that with an P-02 (Omega fire control group), so it's quite different from yours.  CGW tells me it's likely the trigger bar spring needs a little more or little less pressure.  I haven't messed with it too much due to a nasty little virus, but I'll look at it soon.  BTW, CGW is wonderful to deal with if you have a problem.  you'll get a staff 'smith on the phone within minutes to help diagnose a problem. 

If I can make a suggestion, there are benefits to working on these guns yourself.  It's not for everyone of course, but you can save a lot of money and be sure its done correctly.  I've, unfortunately, had shoddy work done by even best in their field gun smiths, which required a trip back to their shop for repair.  Working on them yourself also gives you the ability to become intimately familiar with your gun and tinker with it if something needs replacement/adjustment.  Good luck and enjoy your new toy!

[SI VIS PACEM PARRABELLUM]

CGW has excellent customer service and they are always willing to help sort out any issue that arises even when they didn't originally install the parts. You should have called them but that's water under the bridge now. Also posting this across multiple sections on the forum will only get the mods mad at you. You won't get any better response than what you've gotten already.
All that said I do my own work so the first thing I would have checked would have been the trigger bar spring tension and as mentioned already the trigger stop screws.

[Whereisit]

I don't quite understand why you didn't go to CZ Custom in the first place. Nothing against Cajun Gun Works at all but if CZ Custom is local to you why would you go with Cajun Gun Works and the gunsmith that's not really familiar with CZ? Nonetheless I hope you get it sorted out and enjoy your gun.