Patriot Ordinance Factory - Roller Cam Pin for AR-15/M4 type rifles
The Roller Cam Pin lowers friction and smooths operation of the cam pin and the bolt carrier within the upper receiver. This is especially helpful with Piston Driven operating systems since the initial movement of the bolt carrier and cam pin can be quite abrupt. It can also protect the upper receiver from excessive wear from the cam pin on some piston systems. Is beneficial to any AR-15 operating system and especially those that run on the fast side. Cam Pin body is hard chrome plated and roller is NP3 coated. Simple drop-in installation. Just replace factory cam pin when field stripping your bolt carrier group.
*Note: Designed for Piston Guns. Will not fit past the bolt carrier key on some Direct Impingement Guns without modifying the carrier key.