Quoted: yes,,, I put a jewell trigger in my bushmaster, set it to light and it will slam fire...
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that's not a slam fire, a slam fire is when the fireing pin sets off a round by either haveing a soft primer of the pin is gooked up and protruding. this is a link to fulton armory and what they had to say
A "Slam Fire" is simply the condition when a round is discharged without the normal firing mechanism being employed. Slam Fires may be caused by a broken/protruding firing pin, foreign matter on the bolt face, firing pin intertia, or other means. A Slam Fire may occur *in* or *out of* battery. In the first case, we have a truly Accidental (in contrast to a Negligent) Discharge with little or no potential harm to the shooter. In the latter, the breech is unlocked and *very* bad things can happen.
To be truly pendantic, there are those firearms that depend on "slam fire" for functioning, typically subguns such as the M1A1 Thompson. The firing pin is a bump on the bolt face.
In conclusion, where M1s, M14s and M16s are concerned, lighter firing pins are better, and use Mil-Spec primers.
link Slam Fire: a Parable...During the development of the M16, field testing revealed an unexpected tendency to slam fire, that is, for the cartridge being chambered to discharge without the trigger having been pulled. Needless to say, this created much wailing and gnashing of teeth in the Technical Coordinating Committee. Since Secretary McNamara had been led to believe that the M16 was a fully developed weapon system, the fault had to lie with the ammunition.
Thus the Remington executive was brought forth and mightly chastised for the high crime and misdemeanor, "high primers." When the Remington man revealed that examination of tens of thousands of cartridges revealed no high primers, and that were the fault to be with the primer height one would expect out-of-battery fires rather than slam fires, he was told, "never mind."
Then Springfield Armory did a kinetic analysis and Lo! The firing pin inertial energy was 10 inch pounds! And the specified "no fire" energy level for the primer was 6 inch pounds! And the multitude stood in wonder, wondering why the d*mn thing didn't slam fire every time!
But, the M16 was a fully developed weapon system, so the primer, it must be changed! Only after a yield analysis revealed a potential 90% scrap rate with the new spec, was that avenue abandoned.
And in the end, Colt lightened the firing pin, and all was well again. Until Ball Powder, but that is another story.
Oh, and in 1941 Springfield Armory lightened the M1 Rifle firing pin. That couldn't have been to reduce slam fires, could it?
linkI've shot semi and fullauto's, never have I had a slam fire useing wolf or q3131, and q3131a