The One Horse AR15 Complete Upper (brand part no. OH-CU06) is a complete AR-15 upper chambered in .300 AAC Blackout with a 7.5-inch barrel and a 1-in-7 twist rate. It’s sold as a complete upper only, with no lower receiver included.

Key Specifications

• Sold as a complete upper, with no lower included.
• Barrel measures 7.5 inches.
• Chambered in .300 AAC Blackout.
• Uses a 1-in-7 twist rate.
• Ships at approximately 3.384 lb.
• Includes the bolt carrier group and charging handle as part of the complete assembly.
• Fits standard mil-spec AR-15 lower receivers.
• Cataloged by One Horse under its OH-CU complete-upper model line.

Frequently Asked Questions

Is this short-barreled upper itself an NFA item? No, it’s sold as a complete upper only. Barrel length restrictions only come into play if it’s paired with a shoulder-stocked lower under 16 inches overall, which requires ATF registration first.

Does this include a lower receiver? No, this is a complete upper only; the lower receiver is sold separately.

What caliber is this upper chambered in? .300 AAC Blackout.

Buy the One Horse Complete Upper, 7.5in, .300 AAC Blackout

Order the One Horse AR15 Complete Upper through our One Horse lineup at Schaefer Defense and we will ship it fast, fully insured, from our Lubbock, TX gun shop, along with more AR15 uppers.