Firing Pin and Retaining Pin Kit
Correctly formed of spring steel, the Firing Pin Retaining Pin is absolutely necessary for the safe functioning of your rifle. Never substitute a common cotter pin for a real Firing Pin Retaining Pin or you can damage your Bolt Carrier and Firing Pin.
Carefully machined to exacting tolerances, this quality Chrome Plated Steel M16 Firing Pin differs from the AR15 version by having a larger diameter collar just after the head of the pin. When performing maintenance inspections, make sure the tip of the firing pin is neither too blunt (causing possible misfires) or too sharp (possibly piercing the primer). For safety, replace it if you have any doubts.