FailZero AR-15 .450 Bushmaster EXO Nickel Boron Bolt Carrier Group

The FailZero AR-15 .450 Bushmaster EXO Nickel Boron Bolt Carrier Group is a fully assembled drop-in BCG compatible with .450 Bushmaster upper receivers. Featuring heavy-duty tool steel construction, this BCG boasts an EXO nickel boron coating that provides natural lubricity, extreme durability, and increased wear and corrosion resistance for long-lasting service you can depend on. Includes a precision-machined bolt and extractor (.458 SOCOM and .450 Bushmaster compatible), bolt carrier, cam pin,