Precision machined from high tensile strength 7075 T6 Aluminum Alloy Forgings - Bushmaster DOES NOT use castings.
Bushmaster Receivers are guaranteed for fit and function to ensure that if you ever buy a second Upper Receiver/Barrel assembly, it will be completely compatible and interchangeable with your lower receiver.
M16 A2 design reinforcement area around front pivot pin and reinforcing ridge over the receiver extension attachment area for extra strength.
Protective finish: Hard Anodize Military A8625, Type III, Class 2 finish (lusterless, flat, approximate Black No. 36118 Table IX). We do not paint our receivers.
Surfaces are bead blasted to a non-reflective matte finish prior to anodizing.
A Nickel Acetate final seal coating protects against corrosion.
Raised "ridge" around magazine catch button protects against accidental magazine release.
Standard pivot pin design connects uppers and lowers with captivated front pivot pin and rear take down pin (so the pins can't fall out and become lost).
Bushmaster Receivers are guaranteed for fit and function to ensure that if you ever buy a second Upper Receiver/Barrel assembly, it will be completely compatible and interchangeable with your lower receiver.
M16 A2 design reinforcement area around front pivot pin and reinforcing ridge over the receiver extension attachment area for extra strength.
Protective finish: Hard Anodize Military A8625, Type III, Class 2 finish (lusterless, flat, approximate Black No. 36118 Table IX). We do not paint our receivers.
Surfaces are bead blasted to a non-reflective matte finish prior to anodizing.
A Nickel Acetate final seal coating protects against corrosion.
Raised "ridge" around magazine catch button protects against accidental magazine release.
Standard pivot pin design connects uppers and lowers with captivated front pivot pin and rear take down pin (so the pins can't fall out and become lost).