Shop › KAK AR15 BCG M16 556 NP3 9130 GRY KAK AR15 BCG M16 556 NP3 9130 GRY $202.49 KAK Industry Bolt Carrier Group, 556/300 Blackout, 9310 Bolt Steel, NP3 Finish, Gray 425-0506-001 Quantity: Add To Cart Added! KAK Industry Bolt Carrier Group, 556/300 Blackout, 9310 Bolt Steel, NP3 Finish, Gray 425-0506-001