I had someone tell me that if I take out the trigger springs in the Sigma I can get a slam fire. I have looked this gun over well and there is no connection to the slide safety, firing pin and any trigger spring. I can not conceive of how it could affect the function of the gun except trigger pull. Maybe it could not reset if the return pressure was not strong enough, but not any function of the firing pin. Did I miss something?
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Question about slam fire
- Thread starter edteach
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There is enough fertilizer going around about the Sigma to grow tomatoes for everyone on this forum, so you have to be careful about the source of info. I am convinced that the "someguy" who keeps spreading it is the dumbest tool around--followed closely by the people who believe it.
According to my conversation with S&W about modifications to the Sigma (I am an IDPA match director and wanted to know the safety of the mods) the failure mode for cutting, removing, or replacing the sear springs (the trigger spring just returns the trigger to forward position) is simply that the gun fails to fire.
A slamfire generally requires a broken striker that somehow holds the broken piece, just as with any other semi-auto. Any semi-auto should be pointed in a safe direction when loading in case of this rare event.
Hope this helps.
According to my conversation with S&W about modifications to the Sigma (I am an IDPA match director and wanted to know the safety of the mods) the failure mode for cutting, removing, or replacing the sear springs (the trigger spring just returns the trigger to forward position) is simply that the gun fails to fire.
A slamfire generally requires a broken striker that somehow holds the broken piece, just as with any other semi-auto. Any semi-auto should be pointed in a safe direction when loading in case of this rare event.
Hope this helps.
I figured I was right. At worst a trigger would not return to posistion, but could not slam fire.
All you will do by removing the sear springs is weaken the reset capability as stated above the only way you would get a slam fire is if the striker somehow stayed in the forward position.
I experienced one with my AK it has a floating firing pin, after several mags the pin became clogged up and stayed in the forward position. I racked the bolt back let it fly forward then boom scared the hell out the guy next to me. Thankfully it was pointed down range.
Thats why you should never cycle live ammo unless you plan on it firing
I experienced one with my AK it has a floating firing pin, after several mags the pin became clogged up and stayed in the forward position. I racked the bolt back let it fly forward then boom scared the hell out the guy next to me. Thankfully it was pointed down range.
Thats why you should never cycle live ammo unless you plan on it firing
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ih8suvz
Member
This thread got me thinking about my newly built AR-15. After chambering the rounds with live ammo, I noticed all the rounds had a light dimple on the primer. This scared the hell out of me as I thought my rifle had a problem. I did some research and found this to be a common issue because of the free floating firing pin. I will never ever do a function test again with live rounds, not in my house anyway. I'll be using snap caps from now on.
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I have had one 1911 stick a firing pin forward and which emptied itself right quick at the range....also have had a 1911 with worn cocking notch AND weak sear spring fire when chambering a round....so, yes, always point in a safe direction when chambering...the Sigma seems hard to induce a slamfire...seems the safety plunger would need to be disabled first....i know people have managed to reassemble a Series 80 1911 with the firing pin locked forward by the plunger, which took a very conscious effort to do so, and the FP protrusion was such that it would not feed, and had to be single loaded to have the "accidental" discharge which then happened...many guns with freefloating pins dent primers, and it's why the military primers were harder than most commercial...a Garand is a good example of a gun waiting to go kaboom with wrong reloads...
Jc85
Member
this thread was very informative. I enjoyed reading it. and put my mind at ease about my sigma.
The gun designs featuring a plunger of some sort phyically blocking forward movement of firing pin or striker unless trigger movement pushes it up and out of the way are about as proof against an unintentional firing of the gun as can be made.....surely, there could be a combination of gunk and broken spring that could induce it stay up to allow passage of pin or striker, but even then, gravity normally would keep it in the down position, and all this still needs something causing the pin or striker to move forward as well....the Sigma would take some real ingenuity to bypass all the safeties, but give Bubba a chance and he'll figure out a way, as in the above cited Series 80 case....
leejack
Member
Myths about the sigma on the internet are so amazing, I can't wait to pay my cable bill this month so I can read some more.
The sigma is what it is, does what it does, and does it quite well without any help at all.
The sigma is what it is, does what it does, and does it quite well without any help at all.
