Extended firing pin for a 7.62 x 39 platform. This firing pin is turned .015 longer for surplus ammo and Wolf ammo. This firing pin is newly manufactured, not re-machined...you can install this firing pin in your 5.56/.223 upper with no problems. It will not pierce primer.We utilize a Swiss Type CNC machine and this is turned from 17-4 stainless steel and to hardened to 44-45 Rockwell to maximize the life of the firing pin.