Modifying Heavy Trigger Pull on S&W 9VE Allied Forces

[Guest justaman30]

I own and carry a Smith & Wesson Sigma 9VE Allied Forces model handgun. The gun is double-action only with hidden hammer, which is its primary form of safety. I would like to lessen the amount of trigger pull necessary. Has anyone done this before? What is required? It currently breaks at about 10 pounds.

[Guest 270win]

Check with some gun websites and gunstores or even Smith and Wesson to see if you can get a new trigger connector/spring to reduce the weight. I have a Glock 19 9mm and it is a matter of changing out the trigger connector spring to increase or decrease the weight from the standard Glock 5.5lbs. The S&W Sigma has many of the same features as the Glock, inside and out. The takedown to clean the Sigma is the same as the Glock.

[nightrunner]

i have heard that a glock spring will fit a sigma.

the heavy trigger pull on a sigma is there because of its lack of safeties.

[Guest justaman30]

Smith & Wesson does not show different springs for this model handgun in the parts list online, only the original. Any suggestions for other gun sites that may have such a thing?

[Mike.357]

How many rounds have you put through the pistol?

Mine has lightened considerably since I first bought it. My only complaint about the Sigma is the relatively long reset on the trigger. But with practice that has been adapted to.

[Guest justaman30]

The pistol has had 650 rounds through it to date. I have noticed no lessening of the pressure to date, but this may not be enough rounds.

[Mike.357]

I am not sure what round count I was on when I noticed the trigger being easier to pull. Heck for all I know it is the same and I have just gotten used to it. The pull really is not an issue anymore. for me.

Mine has at least 2000 rounds through it and I am very familiar with where the trigger makes it go bang. And that may be why it seems easier to pull.

[molonlabetn]

Wolff offers a reduced power striker spring: http://www.gunsprings.com/SemiAuto/SmithWessonNF.html#Sigma4

That's really the only way to improve the pull much, since it's a DAO. You might be able to polish up the sear engagement a bit to make it smoother... but pretty much you'll just have to live with a heavy trigger as long as you keep that gun.

[Guest justaman30]

Thanks for the site and information Molonlabetn! I spoke with our local Gander MTn. store gunsmith and he says that S&W will eventually offer a factory spring pack for it, but they don't now. I will definitely visit the site and look into this. Thanks!!

[Guest justaman30]

Wolff offers a reduced power striker spring: http://www.gunsprings.com/SemiAuto/SmithWessonNF.html#Sigma4

That's really the only way to improve the pull much, since it's a DAO. You might be able to polish up the sear engagement a bit to make it smoother... but pretty much you'll just have to live with a heavy trigger as long as you keep that gun.

OK Molonlabetn, I have ordered a pack of 3 springs from the site you recommended. After they get here and I install them (if I can without a gunsmith) I will pull a field test and post the results. This may help Sigma owners alot. Thanks again for the great referral.

[Guest justaman30]

OK - I replaced the firing pin spring and reduced the trigger pull to about 8 pounds. Go to the following post on this site for details and some pictures. Thanks to everyone for the great advice.

http://www.tngunowners.com/forums/showthread.php?p=139452#post139452

[Guest RISC777]

I went a different route on my 40VE than replacement springs. Perhaps not a great recommendation per warranty considerations, but it was a work-able option for me.

[alwayspackin]

I can tell you by experience that replacing the firing pin spring is not the best option. I have done trigger jobs on several s&w 9mm and 40s. There is an extra spring that needs to be removed and a few parts that need to be polished. You can get the trigger pull down to about 4 pounds after doing this. The trigger was made extra strong after Glock sued them. This gun was intended to be a cc gun.

When you change the firing pin spring you increase the risk of a jam. What good is a jammed gun when you’re DEAD? Don't play runlet with your life. That firing pin spring matches the gun perfectly. Look at the M&P and glock. Compare what the differences are. The big difference in the S&W VE's is the extra spring. The parts on the inside were tumbled and not polished like the parts in the M&P and other guns with lighter trigger pulls.

[DMark]

I can tell you by experience that replacing the firing pin spring is not the best option......

I agree. I had too many FTFs with the Wolff spring. In fact I think that Wolff even warns that FTFs can happen with the reduced power.

I took the Wolff spring out and used this DIY on the S&W Forum and it worked well for me. With this mod the Sigma's trigger feels more like a double action only revolver.

http://smith-wessonforum.com/eve/forums?s=884106832&a=tpc&m=1031000282&f=580103904

Its a shame that the stock Sigma has such a heavy trigger because I find that the firearm itself handles so much better than a Glock.

[Guest justaman30]

I have had no problems after changing the spring in my Sigma to a Wolff spring, after about 400 rounds now. But I appreciate the advice and plan to look into the links above and give their process a try. Thanks!!