CZ75B trigger reset/return problem?

[techj]

I’m new to CZ’s and have a recently purchases (new) CZ75B and now have almost 800 rounds through it.  At about 500 rounds the trigger pin starting walking out and I replaced it with a CGW floating trigger pin and also changed the trigger return spring to their reduced power version (to make it easier for me during dry fire).

What I’m running into is that on occasion the trigger does not seem to reset fully and pushing it forward doesn’t help.  If I pull on the trigger again (after fully releasing) it will fire properly on the next trigger pull.  This is without doing anything else.

My last range session it happened 4 times out of 114 shots (total of 6 different mags, each a 19 rounder) with a different mag each time and it was never the first or last round.

Any ideas as to what to look for?  Did I mangle the TRS when I replaced it (it was a pain to get in) or push something out of alignment? Or ???

Appreciate you folks helping a CZ newbie (although experienced with other firearms).

[Tok36]

If i am reading you correctly.

 

I would check the Trigger Bar Spring position and tension. Make sure that both legs (right and left side) of the TBS are positioned in the groves located on the underside of the Trigger Bar. Once the TBS positioning is established, the tension of each side may also need to be adjusted for proper function.

 

It could be a few other things but i this is where i would start. I am also interested to hear other forum member input on your question.

 

Here is a reference picture of the TBS. Removing the pistols grips should give you access to adjust them.

Note: In this picture the TBS is slightly out of its grove.

Edited August 15, 2018 by Tok36

[techj]

I’ve rechecked everything that I could including the position of the trigger bar and the movement of the trigger bar when the trigger is released and everything looks fine.  Even removed and reinstalled the trigger spring.

Even though I know it was clean I’ve re-cleaned the gun and blasted the sear cage (w/Hornady one-shot gun cleaner & compressed air).  Nothing came out that I could see.

Extensively dry-fired (over 100 pulls in DA and at least 50 in SA) without a hitch….but that was the case before the malfs during my last range trip.

Unfortunately, I won’t be able to get to the range to try again until early next week.  I will post results – and maybe more questions – after that trip.

Thanks for all of the input.

[Tok36]

Good deal, it sounds like you have covered your bases. I am interested to hear how things go, we all learn from this stuff.

[techj]

Went to the range yesterday and ran 216 rounds – problem occurred 6 times (different mags, sequence in mag, etc.).

After doing some more ‘net research (thanks to the insight Tol36) I came about the info. on false resets related to the trigger bar spring not riding perfectly in the trigger bar.

Closely – lots of light and a magnifier with the grips off for a bottom view – I did see where the right side was barely out of the groove whereas the left side was riding perfectly within the groove.  So, I bent the right side enough to ride in the groove and dry fired some more – about 100 DA’s and 25 SA’s (racking the slide each time) without a hitch.  But based upon the low occurrence rate that may not reflect the real world.

 

Unfortunately, I can only get out to the range about 1xweek so it will have to wait until next week to find out if this fixed the problem or not.

[techj]

Finally made it to the range today and no problems with a little over 200 rounds...so it looks fixed.  When I get to 500+ then I'll call it actually fixed.

[Tok36]

Glad to hear that it is running well. Thank you for the follow up.

[Travolta709]

Need some help, what's the best gun safe option for CZ75B? I know how to use Google and I've found some options but I just wanted to get an opinion from somebody who really knows a lot about firearms and all the accessories.