One Horse 10.5 Inch 5.56/.223 AR-15 Complete Upper

Dominate close-quarters scenarios with this 10.5″ 5.56 NATO Complete Upper Receiver. Featuring a 10.5″ barrel with a 1:7 twist rate, this upper delivers reliable bullet stabilization for a wide range of 5.56 NATO ammunition, ideal for tactical, home defense, or short-barreled rifle (SBR) and pistol builds. The 10″ M-Lok rail provides a lightweight, modular platform for mounting accessories, while the nitride-finished bolt carrier group ensures smooth cycling, enhanced durability, and low maintenance. Complete with a charging handle and built to Mil-Spec standards, this upper is ready to pair with any AR15 Mil-Spec lower receiver for a seamless, high-performance setup.

Product Features

• 10.5″ 5.56 NATO barrel with 1:7 twist for versatile performance
• 10″ M-Lok rail for secure, customizable accessory attachment
• Nitride-finished BCG for corrosion resistance and smoother operation
• Includes charging handle and Mil-Spec upper receiver for drop-in compatibility
• Made in the U.S.A
• Ready to mount on any Mil-Spec AR15 lower receiver Build your compact powerhouse