12 Gauge. 18.5" barrel length. SN: XP21003030. 2.75" chamber length. Cylinder Bore. Black Oxide finish overall set in black synthetic pistol grip stock with rubber recoil pad to butt, picatinny rail for optics mounting to receiver, and a front brass bead sight. Slide action repeating shotgun fed by a tube magazine. Item shows standard make and model markings. Comes in original box with owner's manual.