Upgrade your 450 Bushmaster rifle with the Failzero Nickel Boron Bolt Carrier Group. This high-performance bolt carrier group is precision-machined from tough, corrosion-resistant materials and treated with an advanced nickel boron coating for ultimate reliability and smooth operation. The self-lubricating properties of the nickel boron finish reduce friction and wear, ensuring consistent cycling and enhanced durability even in harsh environments. This bolt carrier group is designed specifically for 450 Bushmaster rifles and comes complete with a bolt carrier, bolt, firing pin, cam pin, and gas key. Please note that this product does not include a hammer. Elevate your shooting experience with the Failzero 450 Bushmaster Nickel Boron Bolt Carrier Group.