CZ 75 B with Omega trigger having issues...

[USMCZ]

Hi folks,

I have a CZ 75 B with the Omega trigger that I bought new in 2009. It has been used heavily as a loaner gun to the local WOT event that my wife teaches twice a year for the past 6 or 7 years. It has a lot of rounds through it.

Last year it started acting up when pulling the trigger in DA mode...it would not fully cock when pulled and would come to rest in the half cock position. I can't tell if it is going fully back and not engaging or not going back enough to catch the sear in the fully cocked position. It works fine in SA mode from a full cock position either manually cocked or by racking the slide. The hammer will stay fully cocked until the trigger is depressed in SA mode.

Doing some research on the web....it behaves similarly to a gun that has had the trigger bar spring knocked out of place by a Mec Gar hi cap mag...this is an old problem if you have never heard of it. I also spoke to Dave at CGW and he suggested it might be a worn trigger spring or one that needs adjustment.



I jumped in with both feet yesterday and completely stripped the pistol for the first time down to it's parts. The trigger spring looks OK but I can't say that with authority as I don't have a new one to compare it to.

The hammer appears to have considerable wear and has two distinct faces at different angles. Is there anything strange about this? Again, I don't have a new hammer from another Omega equipped gun to compare it to.



Looking for any input regarding this matter from experienced members so I don't have to bother Dave until I know what parts to order to try and fix this.

Let me know if you have questions or need additional pics while the gun is still in pieces...lots and lots of pieces :-(

Thanks in advance for any suggestions.

[BisonWorld]

you have an old style omega trigger bar spring, I would purchase a new style one. Also when you say it returns to half cock, do you mean to say it is slipping off the disconnect and falling to half cock, or does it not fall off at all and when you let off the trigger it moves to half cock?

[USMCZ]

Thanks for the feedback...where do you get a new style trigger bar spring?

I believe it might be slipping off the disconnector and coming to rest at half cock. I don't think the trigger bar is cocking the hammer all the way back in DA.

[BisonWorld]

here you go http://shop.cz-usa.com/ProductDetail/0450000044_Trigger-Bar-Spring-Omega

alternatively, you can attempt to bend your current spring upwards, this may relieve your issue. could you take a picture of the face of your disconnect?

[AZ_CZ]

I got no advice BUT Dang your picture taking and gun cleaning skills are Great!

Seriously, my gun & parts don't look that clean when I'm done.

Close up pictures and a gunsmith issue/ question, what a great concept. Kudos.

[USMCZ]

here you go http://shop.cz-usa.com/ProductDetail/0450000044_Trigger-Bar-Spring-Omega

alternatively, you can attempt to bend your current spring upwards, this may relieve your issue. could you take a picture of the face of your disconnect?

Thanks...I just ordered a few of those and the other small springs for this gun from CZ. I also got a trigger bar and a new sear just for spare parts. I did bend the old one and put it back together and it looks like it addressed the problem. Went down stairs to show off to the wife and the trigger stopped resetting...it had never done that once in all the time I owned it. Decided that it was bone dry after cleaning/reassembly and might need some lube. It started resetting after I dropped a little oil around the trigger pin. Can the trigger spring contribute to this? I didn't see that spring available on the CZ site this morning.

I will have to take it apart again to photo the face of the disco......please don't tell me that might be involved...I didn't order a spare one of those today :-(

Are most of these parts interchangeable with the P07 Omega?
I just picked up one of those last week but I haven't taken it down beyond field strip to clean.

[USMCZ]

I got no advice BUT Dang your picture taking and gun cleaning skills are Great!

Seriously, my gun & parts don't look that clean when I'm done.

Close up pictures and a gunsmith issue/ question, what a great concept. Kudos.

Thank you...hows that saying go..."a pictures worth a thousand words" :-)



This ones next on the bench after I fix the Omega..nothing wrong with it except it isn't a Shadow :-)

[AZ_CZ]

Well now you are just showing off with backlighting and sig line.  I bet you are using a real camera to.

[BisonWorld]

for the most part, yes, you can use most P-07 parts such as the disconnect. minor fitting may be required as occasionally dropping in a replacement disconnect will mess up the timing. If the bottom edge of your disconnect face is extremely worn and rounded it would cause the trigger bar to slip off sooner possibly causing your issue (though this seems to be more rare of a malfunction).  A weak or under tensioned trigger bar spring would act in a similar manner (the trigger bar would not be held up as high causing less engagement on the face of the disconnect and as a result would slip off the disconnect sooner or skip it entirely) and is much more likely the cause of your issue.

[BisonWorld]

To clarify, when I refer to the disconnect face, I am referring to the little nub on the right side of the disconnect that makes contact with the trigger bar.

[SpinyNorman]

There are trigger return springs available from Cajun Gun Works and CZ Custom. CZ factory TRS have been known to have some "bad batches" and a few may be prone to break. CGW TRS are reduced power to lighten the trigger pull a bit. CZC TRS are the same power as factory but, like the CGW spring, they are made from better steel. I put the CZC spring in my 75 Omega cause I'm fine with the feel of the factory trigger. Good to hear that the Omega's will run through some ammo.

[USMCZ]

for the most part, yes, you can use most P-07 parts such as the disconnect. minor fitting may be required as occasionally dropping in a replacement disconnect will mess up the timing. If the bottom edge of your disconnect face is extremely worn and rounded it would cause the trigger bar to slip off sooner possibly causing your issue (though this seems to be more rare of a malfunction).  A weak or under tensioned trigger bar spring would act in a similar manner (the trigger bar would not be held up as high causing less engagement on the face of the disconnect and as a result would slip off the disconnect sooner or skip it entirely) and is much more likely the cause of your issue.

Can you see the correct side of the disconnector face you speak of in this photo? I assume you are referring to that rectangular piece on the right hand side of the disco.. It looks in pretty good shape to me. I see just a tine bit of wear where the trigger bar makes contact with this piece. I didn't want to take the hammer out again until I have the new parts to put in for good but I will if I need to.....practice makes perfect.

Thanks again for your input..

[BisonWorld]

looks just fine    at this point I believe replacing your spring will be your best bet.

[USMCZ]

There are trigger return springs available from Cajun Gun Works and CZ Custom. CZ factory TRS have been known to have some "bad batches" and a few may be prone to break. CGW TRS are reduced power to lighten the trigger pull a bit. CZC TRS are the same power as factory but, like the CGW spring, they are made from better steel. I put the CZC spring in my 75 Omega cause I'm fine with the feel of the factory trigger. Good to hear that the Omega's will run through some ammo.

Would I be correct in assuming that the reduction in trigger pull with a reduced power TRS would only be felt in the trigger take up? I am going to put in a lighter hammer spring from the factory one...are the 13# springs the best weight? I reload my 9 mm and almost always use Federal small pistol primers so I have that going for me regarding possible light strikes with a light weight spring.

I hate to think of how many rounds this one has seen and this is the only problem I have ever had with it and it took over six years to surface.

[USMCZ]

Well now you are just showing off with backlighting and sig line.  I bet you are using a real camera to.

I actually got into photography just recently so I could take decent photos of my pistols....(Canon Rebel T4i)

OK...now I'm just showing off :-)