One Horse OH-BR08 AR-15 300 Blackout 7.5" 1:7 Barrel

The One Horse OH-BR08 is a 7.5" barrel chambered in 300 Blackout for the AR-15 platform. Purpose-built for compact 300 BLK pistol and SBR configurations, it features a 1:7 twist rate that stabilizes the full range of 300 AAC Blackout bullet weights, from lightweight supersonic loads to heavy subsonic projectiles.

Designed as a replacement barrel for AR-15 builders, the OH-BR08 delivers a short-barrel option for the hard-hitting 300 Blackout cartridge. Whether you are assembling a new 300 BLK pistol build or refreshing an existing short-barrel rifle, the One Horse OH-BR08 offers the proven 1:7 twist that the 300 Blackout community trusts for consistent accuracy across supersonic and subsonic loads.