OneSource OH-BR08 7.5″ 300 Blackout Barrel – 1:7 Twist

The OneSource OH-BR08 7.5″ 300 Blackout Barrel with a 1:7 twist rate is a purpose-built AR-platform barrel designed for shooters who demand reliable performance in a compact package. Whether you’re building a short-barreled rifle, pistol build, or suppressor-ready setup, this 300 Blackout barrel delivers the versatility the cartridge is known for — effective with both supersonic and subsonic loads thanks to the fast 1:7 twist rate that stabilizes the full range of 300 BLK projectiles.

At 7.5 inches, this barrel is optimized for close-quarters configurations and suppressed use, where 300 Blackout truly shines. The compact length ensures excellent maneuverability without sacrificing the ballistic efficiency that makes 300 BLK a favorite among hunters, home defenders, and tactical shooters alike.

Whether you’re completing a new build or upgrading an existing platform, the OH-BR08 offers a cost-effective solution without cutting corners. Shop online at Deep Roots Rifle Co for fast shipping nationwide, or stop by our gun store in Eustis, Florida to speak with our knowledgeable staff about your next custom build.