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Old November 23, 2012, 09:40 AM   #54
Slamfire
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Join Date: May 27, 2007
Posts: 4,133
Drake Oldham's M1911 drop testing:

http://www.10-8forums.com/ubbthreads...2823#Post92823

I will agree that the series 80 firing pin block will prevent the firing pin from reaching the primer, unless the trigger is pulled. It will prevent "slamfires".

Mechanisms with free floating firing pins are susceptible to slamfires anytime the firing pin makes contact with a primer.

However, the series 80 firing pin block has its own issues. Yes it is “safer” in terms of slamfires, but it will cause failure to fire malfunctions. I have had the plunger drop down in my series 80 Colt. It has only happened once to me in tens of thousands of rounds fired, but it happened to me. The plunger was down as the slide went forward which stopped the slide and prevented it from going into battery. I had to drop the magazine, clear the weapon, pull the slide back (to figure out what was going on for one thing!!) and once I determined that the plunger had dropped down, I fiddled with the mechanism to get it to go back up in the slide.

This is a malfunction that won’t be cleared by a rack and tap.

The series 80 mechanism is an afterthought, unlike later mechanisms which were part of the design process, and it is not something I want in a self defense pistol. It is fine for a paper punching pistol.
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