The Diamondback DB15 BLKGLD is a semi-automatic AR rifle chambered in .223 Rem/5.56 NATO, featuring a 16-inch barrel. The rifle is equipped with a black nitride barrel finish and is optic ready, allowing for easy customization with various optics.Key FeaturesBarrel Length: Fitted with a 16-inch barrel for improved maneuverability.Capacity: Comes with a 10-round magazine.Thread Pattern: Features a 1/2"-28 tpi thread pattern for muzzle devices.Safety: Includes a manual thumb safety for secure operation.Rate of Twist: 1:8" rate of twist for optimal bullet stabilization.