This bolt carrier assembly is designed to work with any AR-15 rifle, upper half, or barrel designed for right hand ejection in the 5.56/.223/300AAC caliber. 

• Caliber: .223/5.56/300AAC
• Bolt Material: Carpenter 158
• Finish: Phosphate
• Properly staked carrier key- per mil-spec
• Chrome Lined interior of the carrier & carrier key
• Fully assembled & complete BCG with carrier, carrier key, complete bolt, cam pin, firing pin, firing pin retaining pin. 
• Made in the USA by DD'S RANCH LLC
• 300 Blackout Compatible
• Lifetime Warranty Against Manufacture Defects