SIGMA .40 TRIGGER PULL

[RON1955]

I just finished going through 2 magazines of 180gr. After watching a video on Youtube about hand placement,I corrected my low and to the left. It would be easier to shoot if the trigger pull was a little shorter. I removed the pigtail spring and left the outer spring in,polished the sear. It is as smooth as any pistol I own. Has anyone come upon a way to shorten the trigger pull, if just a small amount?

 

[WildCard ZX6R]

Without effecting reliability ? No.

 

[RON1955]

I want it to as safe and reliable as possible. So I will just practrice a lot with it.

 

[KyWstJoe]

I believe it could be shortened by taking a little off the top of the striker where the sear releases it. If you examine the mechanics of it, the sear pulls the striker back until it slips off. If it was flattened a bit it would slip sooner. The question is would it create light primer strikes? This is not a job for anybody other than a real gun smith. It is comprimising safety and in no way am I sugesting you do this. It also would probably void your warranty.

 

[vonhughes]

I just finished going through 2 magazines of 180gr. After watching a video on Youtube about hand placement,I corrected my low and to the left. It would be easier to shoot if the trigger pull was a little shorter. I removed the pigtail spring and left the outer spring in,polished the sear. It is as smooth as any pistol I own. Has anyone come upon a way to shorten the trigger pull, if just a small amount?

Can you provide that video link?

I have the same pistol and same problem.

 

[jppezz23]

Why mess with trigger pull and possibly void your warrenty.Just practice more.

 

[WVfishguy]

My Sigma .40 has a great trigger - I used snap caps and dry fired a lot.

 

[kona0197]

So the Sigma works better without the pigtail spring? What do I use to polish the sear?

 

[WildCard ZX6R]

So the Sigma works better without the pigtail spring? What do I use to polish the sear?

I wouldn't say it works better, but the pull seems to be a bit lighter. Good luck getting that spring back anyway if you take it apart, i never could.

 

[kona0197]

Anyone know how to get the spring back in? Do I really need it? And I was wondering if anyone knew where to find an exploded view of the sear assembly.

 

[angel71rs]

All I read said the spring is only there to increase trigger pull requirement, so it's referred to as "the lawyer spring". As far as polishing, I used a flat needle file to lightly deburr all contact surfaces on the sear, striker, inner part of the stirrup where sear rides. Needle file to deburr the holes. Followed up with 400 sandpaper lubed w/WD-40, then 1000. Cleaned it up, reassembled, lubed lightly w/oil.

Be careful when you reassemble, someone just posted about launching the inner spring into lower earth orbit. I installed the top pin 1st to help align the springs, then blocked the front/rear of stirrup w/ a finger/thumb to contain the springs, compressed and slipped in the lower pin. Once the lower pin is in, upper pin will try to slide out, so heads up it doesn't grow legs.

I never managed to find a detailed exploded diagram of the sear block, just one general pistol diagram. But did find a thread with excellent close-up pics, links to both:

http://stevespages.com/ipb-sandw-sigma.html
http://smith-wessonforum.com/s-w-smithing/76028-sigma-trigger-work-pictures.html

 

[kona0197]

Well I got the spring back on the sear assembly. It was tough. Thanks for the help.