Odin Works Low Mass Bolt Carrier Group AR-15 .223/5.56 Black Nitride

The Odin Works Low Mass Bolt Carrier Group is a high-performance replacement BCG engineered for AR-15 and M4 platform rifles chambered in .223 Remington, 5.56 NATO, and .300 Blackout. Designed for shooters seeking reduced reciprocating mass, this low mass BCG helps tame felt recoil, allows the rifle to cycle more smoothly, and is particularly well-suited to shorter gas system configurations and suppressed use.

The carrier is precision-machined from 8620 case hardened steel and paired with a 9310 steel bolt, both finished in a low-friction black nitride coating. The advanced nitride treatment creates a hardened surface that reduces friction, improves lubricity, and resists corrosion far better than standard phosphate finishes. The Mil-Spec Type 2 bolt face and overall dimensions ensure drop-in compatibility with standard AR-15/M4 upper receivers and barrels chambered in the supported calibers.

Built as a true high-performance part, this Low Mass BCG changes how your rifle cycles and feels on the gun. It is engineered for reliable function across a wide range of ammunition and is fully compatible with both 5.56 NATO and .300 Blackout platforms, making it a versatile upgrade for duty, defense, competition, and sport applications.