One Horse LLC 7.5-inch Barrel, 1-7 Twist, .300 Blackout

The One Horse LLC 7.5-inch Barrel (brand part no. OHBR08) is chambered in .300 AAC Blackout with a 1-in-7 twist rate, fast enough to stabilize both supersonic and heavier subsonic loads. At 7.5 inches, it’s sold as a barrel only, with no upper receiver, bolt, or lower included.

Key Specifications

• Measures 7.5 inches long.
• Chambered in .300 AAC Blackout.
• Uses a 1-in-7 twist rate, stabilizing both supersonic and heavier subsonic .300 BLK loads.
• Sold as a barrel only, with no upper receiver, bolt, or lower included.

Frequently Asked Questions

Does this barrel make my AR-15 an SBR? No. A barrel sold on its own is not a regulated firearm. Installing this barrel on a complete, already-assembled rifle lower with a shoulder stock requires an approved ATF Form 1 before assembly; building it as a pistol with no stock avoids that requirement entirely.

Will this stabilize subsonic .300 BLK ammo? Yes, the 1-in-7 twist rate is fast enough to stabilize the heavier subsonic bullet weights common in .300 Blackout as well as lighter supersonic loads.

Does this include a bolt or upper receiver? No, this is a bare barrel only; the upper receiver, bolt carrier group, and lower are sold separately.

Buy the One Horse 7.5-inch Barrel, .300 Blackout

Order the One Horse LLC 7.5-inch Barrel through our One Horse LLC lineup at Schaefer Defense and we will ship it fast, fully insured, from our Lubbock, TX gun shop, along with more rifle parts.