One Horse AR-15 Barrel Features The One Horse AR-15 Barrel is machined from 4150 steel and cut to 7.5 in length making it a popular choice for compact AR-15 pistol builds that prioritize maneuverability over reach. A 1:7 twist rate stabilizes the full range of common 5.56mm NATO bullet weights from lighter varmint loads to heavier match and tactical rounds. The medium profile strikes a balance between weight savings and the barrel mass needed to manage heat during sustained or rapid firing strings. Running on a pistol-length gas system this barrel is purpose-built for the shorter gas tube configuration used in compact AR builds. A 1/2x28 threaded muzzle gives builders the flexibility to add a compensator flash hider or suppressor sized for the common 5.56 thread pitch. This barrel is manufactured by One Horse specifically for AR-15 platform builds giving customers a dependable option for assembling or upgrading a short-barreled pistol configuration. The combination of a 7.5 length and pistol gas system makes this barrel well suited for compact close-quarters oriented builds where overall length and weight matter most. For builders looking to complete a short AR-15 pistol project this barrel from One Horse offers a durable purpose-matched option. One Horse AR-15 Barrel Specifications Manufacturer: One Horse Model: AR-15 Barrel Caliber: 5.56 Barrel Length: 7.5 Barrel Profile: Medium Material: 4150 Steel Twist Rate: 1:7 Muzzle Thread: 1/2x28 Gas System: Pistol Length Available At: GrabAGun