Well I had to try it... I tried the striker spring mod with the wolf 3.5 pound reduction spring. Went to the range and light strike like crazy first round would fire and then the rest not so much. Swapped out the light spring and put the factory spring back in and back to normal. Anyone else experience this? I learned my lesson.

S&W M&P40, SW9VE, SW40VE

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M&P 40, M&P 40C,

wow that sucks! ive seen alot of mods tried in this forum in the time ive been here and i have only modded my front sight and shined my slide everything else i have left factory until Apex comes out with there kit for the sigma

I've been reading the same thing on a few forums. I figure no since in wasting my time or money. Although I also hear if cci primers don't require as hard of a strike to fire. You may try some cci ammo see if it's true.

Think I will wait for an Apex solution before I mess around with it again. After all Apex made my M&P 40fs Perfect! I am sure if they come out with something for the sigma it will be the same.

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M&P 40, M&P 40C,

cci has hard primers try federal ammo they are the softest

I also have tried the "Wolf" firing pin spring with light stikes. I really don't think there was much of a noticible difference to the trigger pull weight. I have tried numerous combinations of drop in springs, removing "pig tail" spring and so on with less than satisfactory results. I ended up with all the factory parts back in it until there's a real alternative.

The best thing we can hope for is that Apex is listening and working on something for us Sigma owners. To have a nice clean 4-5lb trigger on a Sigma would really take it up to the next level. This would put the Sigma in a Class above, JMOP.

Call me silly but what else can Apex do? The standard striker spring is about 5 pounds. All of the additional springs would have to add something to that 5 pounds. I'll admit, I removed the pigtail and there was a slight difference but the biggest change came with good old fashioned range time. Normal wear/polishing of the internal parts through use. I would have to assume that the best reliable weight would have to be a pound or two above the 5 pound striker spring weight. A 4-5 pound trigger pull would be unreasonable (and unreliable I would guess) on a Sigma. Ok gun geeks, start tearing up my statements, I'm ready.

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Dem's fightin' words wabbit!!!

since the Striker Spring is not attached to the Trigger Spring(s), I would guess a 3.5lb striker spring could cause "lite strikes" even if the trigger is 7lb.

I use the factory striker spring along with modified trigger springs with no issues.

I am in the process of polishing ALL of the trigger surfaces that rub against the rest of the parts. I would post pictures if it hadn't been done already.

I don't believe there is anything normal about having a trigger that needs to be 'worn or broken in'. the surface of the sear on my Sigma looked like it was cut out with a cutting torch, by hand. it was the one thing that almost kept me from buying it. I'll find a pull gauge and get the numbers when I get everything back and together.

Ron

polished sear,sear tower,striker,firing pin safety,trigger arm not just where trigger contacts sear tower but side that contacts the polymer frame,polishing bottom of slide where trigger contacts the firing pin safety does wonders at making the pull smooth. but polished surfaces are easier to clean as well I had a near mirror shine to my parts.

wearing the sear springs and tweaking the pig tail spring lowers the weight a good bit.
trigger spring is delicate to wear as too much stretching can keep the trigger arm from returning to sear pin but little tweaking can help. trigger on my 9ve was 5-6 lbs and smooth as glass had all springs in if I removed the pig tail spring and used the wolf reduced weight striker spring it would be around 4 lbs but I like cci primers and had the gun for self defense I wanted it to be reliable so stuck with factory striker spring but for competition use only would have no reservations about using the wolf spring and taking the pigtail out and removing the outer sear spring which would give a trigger pull 3.5 to 4 lbs.

stretching the springs then compressing them will wear them down though is not to be rushed to excess. twisting the pigtail spring will do a little to reduce weight yet keep the designed purpose of having it keep the gun reliable. clipping extra coil from top and bottom of outer sear spring helps a little in addition to stretching and compressing it.

little hear and there goes a long ways most of it just simulates wear that would occur with many thousands of rounds of firing which with a new pistol the springs are well spec'd to last many many thousands of rounds and I would be surprised just how many it would take to wear the sigma out guide rod spring probably be first to need replacing.

I picked up the "lighter spring" and installed it..after approx. 8-10 ftf's i took it out and re-installed the factory one.Didnt really notice diff. in the pull and i need it to go bang!(it's some place in my range bag floating around) Did some polishing on the internals and i'm really happy with that.

I agree, it needs to go bang!

I have yet to polish anything, I will probably get at it this weekend.

I have three of those sear springs if anyone wants them for some strange reason or another I don't want them.

S&W M&P40, SW9VE, SW40VE

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M&P 40, M&P 40C,

Hang on to them Shark, you never know when they might come in handy. And I agree, "Bang" is a lot more fun than "Click!"

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Dem's fightin' words wabbit!!!

SurgicalShark, if this is a carry weapon you messed up toying with the springs and such. A polish of all sear parts to smooth the trigger is a good thing but everybody knows the Wolf springs cause light primer strikes, even Wolf advises against using them for a self defense weapon. The Sigma will go bang every time you pull the trigger if you don't mess with it. You can't make a 1911 trigger out of a Sigma.

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US Army 1965-1971

Lesson learned! My carry weapon of choice is my M&P 40C. The Sigma's are range weapons for my son to learn with. The SW9VE was the one I tried to tinker with and it has since been returned to the original factory condition. It goes bang every time again. The boy has decided that he likes the M&P line and is saving for his first M&P.

S&W M&P40, M&P 40C, SW9VE, SW40VE

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M&P 40, M&P 40C,