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Page General » General Discussion
Archived [ARCHIVED THREAD] - Firing pins with springs.
Posted: 8/4/2001 6:19:09 PM EDT
Time to show my ignorrance.  What benifit do you get by having a firing pin that is spring loaded for lack of a better term.  I know that it supposedly (sp) prevents an accidental discharge when chambering a rnd, but is there any other purpose?  ARs don't have 'em.  I don't believe my M1A or AKs have them.  Someone educate me.

Link Posted: 8/4/2001 6:25:29 PM EDT
[#1]

.223 AR's don't have them but my 9mm upper does.
The bolt camming closed into the carrier keeps the firing pin away from the primer until it is almost fully into battery, hence the floating firing pin.
The pistol caliber upper bolts aren't built like that. They are simple straight blowback and need a firing pin return spring to prevent slamfires.
Link Posted: 8/4/2001 11:16:34 PM EDT
[#2]
It's just slamfire and drop protection.

The AR originally had a potential problem with slamfires. The army looked at various fixes, including less sensitive primers and firing pins with springs. They finally solved the problem by making the firing pins lighter.
Archived [ARCHIVED THREAD] - Firing pins with springs.
Page General » General Discussion
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