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Old November 23, 2012, 09:53 AM   #55
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Join Date: May 17, 2004
Location: NC Piedmont/Foothills
Posts: 638

Mechanisms with free floating firing pins are susceptible to slamfires anytime the firing pin makes contact with a primer.
I think that Mr. Oldham should probably reconsider his comment after careful examination of the way the gun and the Series 80 system functions.

While technically true, the spring-loaded inertial firing pin doesn't really offer much chance of that happening unless the hammer is held at full-cock for an instant, and then jars off as the slide goes home, and even that requires that there's a problem with the sear reset. If the sear resets the way it's supposed to, the half-cock will grab it and arrest the hammer.

Look at the M1 and M14 rifles. The firing pin isn't an inertial type, and there's no spring to oppose it. Eject a fresh round that's chambered during normal cycling, and you'll see a tiny dent from the firing pin every time...yet they don't slam fire on any sort of consistent basis...even with soft commercial primers.

On the Series 80 system...when the gun chambers a round during normal cycling...the trigger is pulled during the cycle, allowing the firing pin to move forward freely...yet we don't get burst-fire unless something else is wrong with the fire control group...neither in a Series 80 nor in a pre-Series 80 pistol.
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Last edited by 1911Tuner; November 23, 2012 at 09:59 AM.
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