Gunsmithing a S&W Sigma 9mm

[Jcastaneda1105]

Hello,

Last year I purchased a Sigma 9mm. Being my first gun I didn't know what to properly ask. With it's heavy trigger action it is not a fun gun to shoot. Does anybody know if it's possible to replace the spring or have it worked on by a gunsmith in the San Diego area?


Thank you,

Javier

[JNunez23]

Youtube is your friend

Maybe you can save the money and do it yourself, seems simple enough.

http://www.youtube.com/watch?v=cKit97YipiE

[demioracer]

Just remember that the Sigma is supposed to be that way because it has no safety. Put 500 rounds through it and it should be slighty better. It will use any and all ammo. Enjoy it for what it is, a good inexpensive reliable gun. I know three people who made Sigma purchases as their first gun and they still enjoy them.

[Excaliburr]

They sell other springs to lighten the pull, but it still won't be a fun gun to shoot IMHO. I see this sort of thing all the time with first time purchasers. They want something so bad and want it to cost as little as possible, so they cheap out and buy the least expensive one expecting it to be as good as the others. There are reasons why other models are more money. Otherwise, why would anybody buy the more expensive ones? Doesn't mean that the Sigma isn't effective at its purpose, just that more research should have been done before the purchase. Perhaps shooting a friends gun or renting one at a range and frequenting different review sites. For me, I am much better at shooting revolvers, however there are reasons for semi-autos. IMO it will be better to cut your losses and sell that one to someone else and purchase a slightly more expensive gun. I am not going to make an opinion on which one, as you need to go to a store that carries many in stock and feel them in your hand. The most important thing is the fit to your hand and the sight to target. Some people fare better with Glock and others like the S&W M&P's. Springfield, Ruger are other possibilities. Just review them well. Sites like this one and gunblast.com + nutnfancy are all decent ones (taken with a little grain of salt).

[GMG]

Hello,

Last year I purchased a Sigma 9mm. Being my first gun I didn't know what to properly ask. With it's heavy trigger action it is not a fun gun to shoot. Does anybody know if it's possible to replace the spring or have it worked on by a gunsmith in the San Diego area?


Thank you,

Javier

If your sear looks like this, there is not much you can do to improve the trigger. Because the pins are not removable like the ones shown on YouTube and you can't change springs or do any polishing.........Sorry.

[JTROKS]

If your sear looks like this, there is not much you can do to improve the trigger. Because the pins are not removable like the ones shown on YouTube and you can't change springs or do any polishing.........Sorry.

I have not worked on a Sigma, but just by watching the video and looking at the non removable pins it can be done. First find out how much will it cost to replace that part group in the pic. Once you find out and you assess the risk is worth that much then find a small grinding bit or the right size quality coated drill bit and slowly drill out the swaged part of the pin on one side. then with the right size punch take the the pin out. Now you just have to look for the correct pin size to replace the one you took out.

[GMG]

I have not worked on a Sigma, but just by watching the video and looking at the non removable pins it can be done. First find out how much will it cost to replace that part group in the pic. Once you find out and you assess the risk is worth that much then find a small grinding bit or the right size quality coated drill bit and slowly drill out the swaged part of the pin on one side. then with the right size punch take the the pin out. Now you just have to look for the correct pin size to replace the one you took out.

JTROKS,

The problem there is the pins are stepped, meaning one end is larger than the other.

[ZenDaddy]

Learn to shoot it.

Yup.

I bought a Sigma. When I first got it I was disappointed by the trigger and how poorly I shot with it.

I was only disappointed because I listened to all of the BS people post about it.

Yes, it is DA only. Yes it has a long heavy pull. Yes it felt just a hair gritty.

I tore it down and polished what could be polished, pulled out the little pigtail, and replaced the striker spring with a lighter version. This improved the feel quite a bit. But it was still a long, relatively heavy, slightly gritty, DA only trigger.

So I started to practice. And practice. And practice.

Countless dry fire trigger pulls, a couple of thousand or so rounds downrange and now I am a pretty dang good shot with the thing! Holding that sight picture through that long trigger pull, controlling my breathing while I do, letting myself be surprised by the break. I can get some very respectable groups now.

I think learning to shoot my Sigma well has made me a much better shooter overall.

In all that time and with all of my messing with it, it has not malfunctioned a single time.

Good gun. Good price. Good experience (ymmv of course).

[soakedntorment]

The sigma was my first handgun i actually started practicing with and it taught me alot as far as trigger control and shooting, Like some dudes said in here the gun is "suppose" to be like that because it has no safety. Sell it if you dont like it get something else but the gun is a good shooter once you get past the heavy DA trigger.

[neouser]

If it's your one and only home defense gun, don't mess with that trigger.

[JTROKS]

JTROKS,

The problem there is the pins are stepped, meaning one end is larger than the other.

I thought they just dimpled the ends of the pins to make them flare out.

[rsmorgan]

The Sigma trigger is kind of gritty when it comes from the factory, but that can be addressed by polishing and/or "wearing in" of the parts from use. The trigger pull is intended to replicate a DA revolver and it does a reasonably good job of doing that. It is what it is, and it isn't a Glock.

A word of caution about the various "trigger fixes" on the web. The Sigma is an incredibly reliable pistol "as built" and any of the trigger work proposals will reduce that reliability to a greater or lesser extent. If it is just a "range gun" it is simply a matter of personal choice. If you intend to use it for self-defense, however, you are foolish to make any changes in the gun. Even the most basic "fix," removing the pigtail "kick spring" can cause problems under some circumstances. The kick spring isn't in there "just to increase the trigger pull." It is in there to force a trigger reset in the most adverse conditions, including a very hot, very cold or very dirty pistol and the more violent movements of the slide if shooting +P ammo.

[buffybuster]

Your mindset about the Sigma is wrong.
You're thinking of the Sigma as a semi-automatic pistol, like a Glock or XD. It's not.

If you think of the Sigma as a DAO magazine fed REVOLVER and shoot it as such (same technique as shooting a DA revolver), then it can shoot pretty well, if you master the technique. IMO that's what S&W designed and marketed it as; a replacement for the DA revolver that can be reloaded more quickly with greater capacity.

If you don't like the Sigma trigger, get rid of the Sigma and get the pistol you're trying to make the Sigma into, whatever that may be.

[Jimmy310]

Sell your sigma and get another gun!

[h0use]

I sent my sigma back to S&W a few years ago and they did a trigger job a little improvement but not much. I would just learn to shoot it. It's a great reliable gun that eats anything you feed it.