Well, I did it anyway

[DarkWolf45]

I've had a second generation Sigma (SW40GVE) for about a month. I have shot many handguns in my years, but the Sigma IS THE WORST TRIGGER I have ever experienced (and I own a Hi-Point). Well, I went ahead and ordered the Apex trigger and spring kit for it. 30 minutes of cautious, careful work and a few drops of oil and I have a trigger very near that of my Glock 35. 5-7mm of pre-travel and 1mm over-travel. A pull weight of 4-5lbs, which is much better than the perceived 20lb, 25mm pull of the factory trigger.
I know some don't like aftermarket parts in their Sigmas, and there are good reasons for this. This is not my primary nor secondary defense weapon but is a canvas for my expression of individuality and a way to learn how this specific machine works. With that being said, I'm not looking to damage the pistol because I've grown rater fond of the ergonomics and simplicity of the design.
If you feel the need to let me know I've made a mistake, please do so. I like the pistol and find it much more enjoyable to shoot now, but as they say, YMMV.

Wolf

[Echo40]

Make sure that you test it to make sure that it still functions with full-power 180gr loads. Supposedly some of these trigger mods come at the expense of reliability when it comes to full-power 180gr SD loads because reportedly the reason why the trigger is so heavy is to ensure that the sear resets properly with the hottest, heaviest loads.

[DarkWolf45]

Thank ya, Mr. Callahan, I will be testing with as many different brands and bullet weights as I can find, over the next few months.
I am always accepting of advice and warnings, I don't know everything, but I'm willing to learn.

Wolf

[noro]

Dark Wolf,

Now this is just my opinion, and mine only. I see a lot of guys
buy a pistol and are totally unhappy with the trigger. A lot of
guys jump in and use the aftermarket before they even fire a
shot.

Others modify after using it, and some work out well, while
others not so well. If the aftermarket works, that's great!
If S&W thought the trigger was so bad, don't you think they
would have improved it? The're mass producing pistols to
be safe, and reliable to a specific price point. A 300 (or so)
pistol will never be a match pistol regardless of 160 or so
Apex modifications.

If you want a match pistol, buy a match pistol. Maybe I'm out
of line, maybe I'm cheap or old, but I can't see spending almost
half the cost of the pistol to try and improve it to something it
was not designed to be.

If you're happy with your pistol, then so am I.

[M29since14]

I have limited experience with the Sigma but I do rather like the one I have. Unquestionably, the trigger is outrageous. You’ll not likely ever fire it “accidentally.” What surprised me is that, in spite of the trigger, I can shoot it fairly well.

I bought the gun with a specific purpose in mind, when Sigmas were being sold for a very attractive price. It would be nice to have a more manageable trigger, but I neither want to put more money in the gun, nor want to modify it from its original configuration. For what it is, I’m OK with the Sigma. I shoot mine about twice a year. It handles and points well for me, and it has been 100% reliable since the day I bought it.

[DarkWolf45]

Noro, you're not out of line. I wanted opinions. The trigger and springs cost me $60 and it's not a permanent alteration. I can put the factory parts back in and it'll be the same gun I bought.
I put a box of shells (proper brass metallic cartridges from Winchester) through it before I decided to change anything. I honestly wasn't expecting much from the Sigma. But I was surprised, it's a workhorse and very solid built. The only hiccup was that horrendous trigger. In my mildly warped mind, I see the $60 as an investment in an otherwise sound machine.
I know it will never be a racegun or a serious match pistol, but it is more enjoyable to shoot now and that means it will see more days on my hip.
I've got a match 1911 and a comp Ruger mark II, but they don't go camping with me, the Sigma probably will.
M29, I agree, the gun feels amazing in hand, and yes, it points very naturally for me. That is why I wanted the better trigger, to round out the "feel" of the gun.

[Golphin]

The other side of the coin is that it is not a high priced pistol or one that will go way up in value so I don't see the harm in trying to get a better trigger. My 45 M&P that I bought new about 8 years ago had a terrible trigger and I put a Apex kit in it and it has never failed to fire since and the trigger is much better.

[DarkWolf45]

^^^^^^^^^^that's my new hero...lol

[noro]

Dark Wolf

And that's cool. Like I said, if you're happy then so am I.
I just see a lot of folks spending tons of money in the after
market to make something out of a pistol or ar15 that
it wasn't supposed to be. Same thing happens in the M1911
world.

There was a post here where a member was advised that
he couldn't upgrade his Shield without the total package of
160 for the kit (while the Shield cost 300) Spending half the
cost of the original purchase on upgrades doesn't make sense to
me. Why not buy a better gun in the beginning?

I'm a big believer in stock guns, and I see a lot of horror
stories here. JMHO if the stock version doesn't perform,
just trade it off and find something better.

In your case, the minimal costs of the improvements worked out well for you, and you're happy with it. So that's all the matters.