Shop › BOOTLEG 5.56 NITRIDE BCG COMPLETE BOOTLEG 5.56 NITRIDE BCG COMPLETE $129.95 Bootleg 5.56 Lightweight Bolt Carrier Group, Machined from 4140, Nitride Coating, Mil Spec Configuration, Staked Mil Spec Gas Key BP-C15-BCG Quantity: Add To Cart Added! Bootleg 5.56 Lightweight Bolt Carrier Group, Machined from 4140, Nitride Coating, Mil Spec Configuration, Staked Mil Spec Gas Key BP-C15-BCG