ONE OH-UBCO1 M16 Nitride BCG – 5.56 / 300 Blackout Bolt Carrier Group

Upgrade your AR-15 build with the ONE OH-UBCO1 M16 Nitride Bolt Carrier Group, compatible with both 5.56 NATO and 300 Blackout. This full-auto profile M16 carrier features a durable phosphate nitride finish that provides excellent corrosion resistance, reduced friction, and easy cleaning — making it a reliable choice for range days, hunting, and defensive applications alike.

The M16-profile carrier offers increased mass for improved cycling reliability across a wide range of loads and suppressed configurations. The nitride treatment penetrates the metal surface rather than sitting on top, resulting in a hard, long-lasting finish that holds up under high round counts and demanding conditions.

Whether you’re completing a custom AR build, replacing a worn carrier group, or upgrading for better performance, this BCG delivers solid value at a competitive price point. Available online with fast shipping nationwide or in stock at Deep Roots Rifle Co in Eustis, Florida — stop by and let our knowledgeable staff help you complete your build.