"Zero-cost fix for SW Sigma heavy trigger"

[SWShootinDave]

For those who would like to make their Sigma pistol much more enjoyable and shootable. This is easily done: Simple, Zero-Cost Fix for your S&W SIGMA Heavy Trigger Pull | Northwest Firearms - Oregon, Washington, and Idaho Gun Owners

 

[staylor]

I ended up taking out the pigtail spring and replacing the outer spring with one from sigmatriggers. I also polished the sear and striker hook and got the trigger pull down to less than 8 pounds. I feel comfortable with that for a SD pistol.

How much is your trigger pull now that you removed both springs?

 

[SWShootinDave]

My resolution to the lousy Sigma trigger pull was to sell the Sigma.

Unfortunately, the liability-lawyer weeniness pooped on the Sigma series by S&W screwed up a good design and lost them a lot of customers and a lot of money. But the simple work shown in the link really improves the shootability of any Sigma. Both of my Sigma's triggers are now as good as or better than any current factory S&W striker-fired pistol.

 

[SWShootinDave]

I ended up taking out the pigtail spring and replacing the outer spring with one from sigmatriggers. I also polished the sear and striker hook and got the trigger pull down to less than 8 pounds. I feel comfortable with that for a SD pistol.

How much is your trigger pull now that you removed both springs?

I just ordered a sear spring from Galloway and will try it with and without the stock inner sear spring.
On both of my Sigmas, I also polished the contact surfaces and worked the sears manually for a good while and used graphite to get the sears' actions really smooth. Both of my Sigmas' triggers, using the stock inner sear springs, and without the unnecessary pigtail springs are excellent and smooth, comparable to a good DA revolver's trigger pull. I don't know the weight because I don't have a trigger-pull scale, but estimating I'd say they're somewhere around 7 pounds. Much easier than stock to shoot well and keep shots on target.
I've decided to get a trigger-pull scale so I'll have that figure; I'll post later.

 

[FoghornLeghorn]

Regarding the OP link....this IS the original S&W mod that they stopped offering for the VE series, correct?

Having just acquired a SW40VE (Stainless Slide...may ceracote it black) that's had less than a box of shells through it, I really appreciate this info. I've been looking at the sigmatrigger site, but this may be the direction I go instead as per the OP's link...the original S&W mod sounds right to me. I've already added a TalonGrips overlay that really improved the grip feel, and installed a set of Mepro Tritium sights yesterday using the VISM rear sight tool (LOVE IT, and highly recommended, btw).

So doing this mod, and maybe a Steel guide rod upgrade, and I should be good. IMO the only possible advantage to the sigmatriggers mod would be the polishing of the sides of the sear. I like the aspect of "free upgrade"! Thanks again.

 

[hatchet jack]

I did something similar to this to my SW9VE. I replaced the inner spring with a lighter pull spring I had in my Box-O-Springs. That made it better. But it still had the "crunch". So I took it apart again and finally figured out the the crunch was coming from the longer inside spring rubbing on the outside spring.

So I removed about 1.5 coils from the inside spring and now no crunch. And the lighter inside spring made the trigger shootable and safe.

My SW9VE has been my truck gun for several years. I love it for that role. Dead nuts reliable and accurate enough for my uses.

Forgot to add but the "pigtail" spring is a real PITA to put back on there. I had to use a slightly smaller slave pin to get it started. Its by far the worst part of the whole job.

I bought a Fobus holster from Academy I case I want to wear it on me.

 

[OKFC05]

Have used Sigmas for loaners and trainers for 20 years and tried all non-destructive mods.

Removing springs can make a light trigger, BUT IT CAN TURN A SIGMA INTO A SINGLE SHOT with max loads, failing to reset the sear. That was the whole reason S&W put in the extra spring: to insure the sear would reset with max loads.

By the way, putting steel recoil rods in a Sigma can CAUSE failures by damaging the frame over time.

 

[FoghornLeghorn]

Have used Sigmas for loaners and trainers for 20 years and tried all non-destructive mods.

Removing springs can make a light trigger, BUT IT CAN TURN A SIGMA INTO A SINGLE SHOT with max loads, failing to reset the sear. That was the whole reason S&W put in the extra spring: to insure the sear would reset with max loads.

By the way, putting steel recoil rods in a Sigma can CAUSE failures by damaging the frame over time.

Extra spring = that pigtail spring? Thanks. FWIW, I have had other Sigma owners say they have steel guide rods and shot many thousands of rounds with zero problems. Go figure... thanks again!