POF'S patented Roller Cam Pin is just one more example of how far they will go to reduce friction and drag. Standard AR cam pins feature a square head that grinds along the inside of the aluminum receiver. Used as a replacement part for most piston AR bolt carrier groups. Note: The 5.56 version fits with all Gas Piston 5.56 carriers, all REVOLUTION carriers, and all ROGUE carriers Mfg: Patriot Ordnance Factory
