taking the plunge-trigger & hammer job

[Sunkist]

I have a year old 75B SA .40. The trigger smoothed out a lot after a couple thousand rounds. But, it still has too much pre-travel and a noticiable cam over the FPB. Right now it breaks at 4.25 lbs. So I took tax refund money and got G10 grips (love them) comp trigger and pins and the adj factory custom trigger from CZ Custom and Schmecky's adj sear and spring kit. I should be ready to dive in by next weekend.

Unless I lose springs etc. I will have about $325 in it now that I've ordered the last of the parts. The grips were the most expensive item but I'll have lots of spare parts when I'm done.

I'll report on my progress. Hopefully I'll be posting a range report in a week. Wish me luck

[Stuart]

Good luck!
you will do fine..just go slow.
you will have an awesome trigger!

[Sunkist]

I got it done-3.25# with a clean,snappy break. I used all the stock springs so far. I used CGW's adjustable sear and it worked like a charm.

I have a couple questions though. I now have a half cock but it's not held back by the safety. It will drop if the trigger is pulled. Is that just an artifact of the sa/da-SA application of the CZ Custom comp trigger when used in a SAO? The regular function of the safety is fine at full cock. There is positive engagement if the trigger is pulled in Safe but the hammer stays put.

 

[Sunkist]

Another update-since I posted the last one I decided to install my CGW spring kit. Wow! I'm at 3# (I'm using my old brass Brownell trigger scale) This trigger is a phenom now-I'm afraid to install the reduced weight trigger spring from CGW now. If it performs as Schemecky says, I'll have a 2.5# trigger. That might be too light for me.

Hats off to Cajun Gunworks and CZ Custom and a big thanks to everyone who has posted the information I needed to tackle this project. David at CGW is a great guy to do business with and CZ Custom who, as always, delivers every time.

[DenStinett]

I got it done-3.25# with a clean,snappy break. I used all the stock springs so far. I used CGW's adjustable sear and it worked like a charm.

I have a couple questions though. I now have a half cock but it's not held back by the safety. It will drop if the trigger is pulled. Is that just an artifact of the sa/da-SA application of the CZ Custom comp trigger when used in a SAO? The regular function of the safety is fine at full cock. There is positive engagement if the trigger is pulled in Safe but the hammer stays put.

Sunkist:
My fully stock B-SA will not move to Safety in Half Cocked and the Hammer does fall when I pull the Trigger in HC
I guess it?s the nature of the beast

[justiw]

I have a new 9mm 75B SA that is totally stock, and it is perfect through 650 rds of 9mm and another 100 or so of .22lr. It does not have a half cock, and the hammer does not have the half cock notch. I wonder if they designed a different hammer geometry for the B SA to get rid of this ability to bypass the safety in half cock. I have been wondering about this for a while because I am considering upgrading my hammer, and all of the factory/aftermarket parts seem to have the half cock notch. I'd rather not have it (half cock notch) if it can possibly produce unwanted or unpredictable results.

[DenStinett]

My 2001 B-SA has a stock Hammer and it does have a Half Cock position
When Half Cocked, I can set the Thumb Safety
When Half Cocked, the Hammer WILL fall when the Trigger is pulled
When Half Cocked, and the Thumb Safety is set, the Hammer WILL NOT fall when the Trigger is pulled?.BUT, I cannot reset the Thumb Safety afterward
How odd is that ? ? ?

[schmeky]

Gentlemen,

The ability to be able to apply the safety at half-cock after the install of the comp hammer (or any hammer with a different/recut profile) is normal.  You have changed the length of the sear safety leg as well as the geometry and the "new" safety is a consequence. 

[justiw]

Schmecky, have you seen any hammers that do not have half cock hooks? Mine is an '11 so it could be new.