One Horse OH-15 Complete Upper Black / Stainless 6mm ARC 18 Barrel

One Horse OH-15 Complete Upper Features The One Horse OH-15 Complete Upper is built around an 18-inch 416R stainless steel HBAR profile barrel with a 1:7.5 twist rate delivering the stiffness heat resistance and dimensional consistency that precision rifle shooters demand for sustained accuracy during extended range sessions. A rifle-length gas system provides a longer dwell time and smoother recoil impulse compared to carbine and mid-length configurations contributing to enhanced cycling reliability and reduced felt recoil with the 6mm ARC cartridge. The 5/8x24 threaded muzzle accepts a wide range of aftermarket muzzle devices and suppressors keeping the upper suppressor-ready for those who want to take full advantage of 6mm ARC s outstanding subsonic and supersonic performance. The 18-inch handguard provides a full-length free-float platform that eliminates barrel contact and harmonics interference for maximum accuracy potential while also delivering an extended and stable gripping surface for a consistent support hand position critical to long-range precision shooting. The 416R stainless steel barrel material provides outstanding corrosion resistance and superior surface finish consistency compared to standard chrome moly barrels contributing to both long-term durability and exceptional accuracy from the first round fired. The complete upper format delivers a ready-to-install assembly that drops directly onto any mil-spec AR-15 lower for a fast and straightforward build or upgrade. Designed for precision rifle builders and 6mm ARC enthusiasts who want a high-quality and purpose-built upper assembly without the complexity of individual component sourcing the One Horse OH-15 Complete Upper delivers an exceptional combination of match-grade barrel quality gas system configuration and handguard length in a single ready-to-run package. The 6mm ARC chambering provides outstanding long-range ballistics wind-bucking capability and energy retention that rivals cartridges fired from much larger platforms making it one of the most capable and efficient precision rifle cartridges available in the AR-15 format. For builders who demand the best in 6mm ARC upper assembly performance the OH-15 Complete Upper is the definitive choice. One Horse OH-15 Complete Upper Specifications Manufacturer: One Horse LLC Model: OH-15 Complete Upper Caliber: 6mm ARC Barrel Length: 18 Barrel Profile: HBAR Barrel Material: 416R Stainless Steel Twist Rate: 1:7.5 Gas System: Rifle Muzzle Thread: 5/8x24 Handguard Length: 18