Griffin Armament Enhanced AR-15 Bolt Carrier Group 5.56x45mm NATO Nitride Black

The Griffin BCG combines an 8620 carrier, MP inspected, High Pressure Tested Bolt, 4340 cam pin and extractor. All the proper heat treats, the correct shot peen, and the often neglected post heat treated grind are present. In a market filled with cast component BCG's, all components are billet machined and all surfaces receive a finish pass in machining for improved surface smoothness. There are varying degrees of quality in Melonite QPQ finishes. These BCG's went to 4 finishing houses for selec