Product DescriptionThe One Horse 10.5-inch 5.56 NATO Complete Upper Receiver is built for shooters who want a compact, ready-to-install AR-15 upper assembly with dependable performance and modern accessory compatibility. This complete upper features a 10.5-inch barrel with a 1:7 twist rate to help stabilize a wide range of 5.56 NATO and .223 projectiles, along with a pistol-length gas system suited for short-barreled configurations. A 10-inch M-LOK handguard provides a slim, lightweight platform for mounting accessories, while the included nitride-finished bolt carrier group helps promote smooth cycling, corrosion resistance, and long-term durability. Built around a Mil-Spec upper receiver and supplied with a standard charging handle, this U.S.A.-made upper is designed to pair with Mil-Spec AR-15 lower receivers.Product Highlights 10.5-inch 5.56 NATO complete upper receiver for compact AR-15 pistol or short-barreled rifle style builds 1:7 twist barrel supports versatile ammunition stabilization across many common 5.56 NATO and .223 loads 10-inch M-LOK handguard offers lightweight modular space for lights, grips, and other accessories Includes nitride bolt carrier group and standard charging handle for a ready-to-mount setup Mil-Spec upper receiver construction and U.S.A. manufacturing for dependable fit and quality Specs Product Type: Complete Upper Receiver Caliber: 5.56 NATO Compatible Caliber: .223 Remington / 5.56 NATO Barrel Length: 10.5 in. Barrel Profile: Medium Barrel Material: 4150 steel Twist Rate: 1:7 Gas System: Pistol length Handguard Length: 10 in. Handguard Interface: M-LOK Muzzle Thread: 1/2x28 Bolt Carrier Group: Included, nitride finish Charging Handle: Included, standard Receiver Type: Mil-Spec upper receiver Lower Receiver Compatibility: Mil-Spec AR-15 lower receiver Country of Origin: U.S.A. UPC: 850078799296 MPN: OHCU02 Brand: One Horse LLC Disclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product&';s manufacturer.