Faxon's AR-15 9mm Integral Rifle Barrels are the perfect choice for any shooter who is looking for the maneuverability of a shorter overall length but want the compatibility and versatility that comes with an AR15 build. With Faxon's Integral Muzzle Device Barrels customers will no longer be locked into a single configuration on their rifle build or be dependent on finding a capable gunsmith to pin & weld their muzzle device to their barrel. Shooters can choose from a 3-port muzzle device or slotted flash hider. Barrel Caliber: 9mm SAMMI Barrel Twist: 1:10 Barrel Length: 16" Barrel Profile: Pistol Caliber Taper Barrel Finnish: Nitride Mfg: Faxon Firearms