pigtail spring
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.357 mag
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my opinion
Here is what I did so far, removed pigtail spring replaced the outer spring but I saved both original pieces for two reasons, 1 if either one of my mods has an issue I can replace it with the original, 2. If anything breaks that is beyond my ability I can always put it back in and send it to S&W with all original parts intact. I do have a question though even after removing the pigtail spring and replacing the outer spring it is still a little stiff I have not brought it to the range yet since changing the internals but my question is
Since the internals are basicly the same as the Glock why cant you just order a trigger spring for a Glock and install it in a sigma ?
Here is what I did so far, removed pigtail spring replaced the outer spring but I saved both original pieces for two reasons, 1 if either one of my mods has an issue I can replace it with the original, 2. If anything breaks that is beyond my ability I can always put it back in and send it to S&W with all original parts intact. I do have a question though even after removing the pigtail spring and replacing the outer spring it is still a little stiff I have not brought it to the range yet since changing the internals but my question is
Since the internals are basicly the same as the Glock why cant you just order a trigger spring for a Glock and install it in a sigma ?
Ok I haven't pulled up a drawing for reference comparison I was just going on what I have heard about the simmilarities with the work I have already done I am at about 5lb pull instead of the normal 11 lb I just wanted to see how light I could get it with simple mods I may try to manufacture a lighter trigger spring or look into an m&p trigger spring and see if It will fit and if it is lighter or not this is just a little project for me to see how cheaply and easily it can be upgraded without comprimising reliability so far I've spent 10 mins spent 1.50 on a new lighter outer spring and reduced 6lbs of pull not too bad I would like to see if I can get it under 3 lbs
What you are calling the "trigger spring", you are describing the sear springs.
From what you have removed already, you have duplicated what is done to IDPA guns for range ammo. It will cause failure to reset the sear with hot defense ammo.
Nothing new about what you are doing; it already compromises reliability with hot defense ammo.
From what you have removed already, you have duplicated what is done to IDPA guns for range ammo. It will cause failure to reset the sear with hot defense ammo.
Nothing new about what you are doing; it already compromises reliability with hot defense ammo.
It MAY cause a failure with VERY hot defense ammo. The only verified instance of this I could find was with +P+ ammo and even then it only failed to reset (as reported) once or twice. And S&W already recommends that you avoid +P+ ammo anyway. I have shot 100's of JHP and +P JHP's through a SW9VE with no outer spring or pigtail spring with no malfunctions of any kind. So it seems more like a theory than an absolute.
What I am calling the trigger spring is the spring that goes from the trigger to arm that is connected to the sear on the trigger bar assembly I am aware that I am not doing anything new or different but that is exactly my point Why spend an additional $150-300 on a Glock when you can spend 15-20 minutes and achieve the same result I have been putting 180gr JHP through it with no failure to reset some people might get all technical with the differences but JHP rounds are good enough for personal defense for me
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If that is really the spring you mean (little trigger return spring), then I can save you some time. It contributes almost nothing to the trigger pull (maybe 1/4 #). The gun will actually fire without it--but the trigger will not return. Glock parts do not fit.
Polishing the metal surfaces in the sear assembly and removing the outer sear spring are the usual mods for IDPA. Standard loads and most +P seem to function OK.
You can change the striker spring, but some get failures to fire. I recommend just keeping it very clean with CRC silicone spray.
I've always said I would love to have a G34 trigger in a Sigma, since I really dislike the Glock grip angle, but it is just not happening.
As to reliability, the point at which reset failures occur differs from gun to gun, and seems to depend partly on the quality of the polish and cleanliness of the gun, and mostly on the slide speed imparted by hotter ammo. In stock form, the Sigma is very reliable, even with indifferent care and +P+. Any removal of springs changes things somewhat, and you have to decide based on your needs what you are going to do.
I don't have any argument with people who modify their guns.
I do have an argument with those who tell the world "they are just as reliable as stock." S&W only added the extra sear spring after customer complaints about sear reset failures.
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I didn't know that about the sear springs good little bit of knowledge I have personally never claimed same reliability fact of the matter anything you change will affect reliability either positivly or negativly just a matter of how much
Dude Jones
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Good lord... why?
I don't think a gun without a external safety should have a trigger that light. Sounds like a "Plexico" waiting to happen to me. I guess if ya just want to make a cheapish gun to show up the Glock guys I could kinda understand but for your sake and mine DON'T carry that thing.
leejack
Member
I like the trigger just the way it came from the factory. It just keeps getting better each and every time out. My shooting skills have gone up to the next level since I've had this amazing gun. As my friend .357 mag has pointed out, it will make a marksman out of you.
One of the things that I like about the sigma is that I feel the trigger design is ideal for home defense or carry; very little chance of an accidental discharge. Jusy my opinion, but if I were to lighten it up to anything below 6 lbs (and I'm not), I would limit the gun to being a range gun only.
Of the many expectations I had when I bought this gun, what surprised me the most after reading so much about it, was how much fun it is to shoot. I love it!
Happy shooting to all,
Lee
One of the things that I like about the sigma is that I feel the trigger design is ideal for home defense or carry; very little chance of an accidental discharge. Jusy my opinion, but if I were to lighten it up to anything below 6 lbs (and I'm not), I would limit the gun to being a range gun only.
Of the many expectations I had when I bought this gun, what surprised me the most after reading so much about it, was how much fun it is to shoot. I love it!
Happy shooting to all,
Lee
Rescue 187
Member
I completely agree !!!!
Does it actually get to be a better trigger pull after x number of rds? Or is that rumor too?
leejack
Member
West Texas, welcome to the forum!
I think it gets sweeter all the time. I'm sure part of that is getting use to it.
Thanks for joining!
Lee
I think it gets sweeter all the time. I'm sure part of that is getting use to it.
Thanks for joining!
Lee
Nope, not a rumor at all...most quality tools require a break in period. Some mfg's actually tell you their firearms will perform better after the parts have had a chance to work. Mine is original, and will remain that way, the way it was intended by S&W.
spricks
leejack
Member
Right on spricks!, Right on!
Lee
Lee
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