This used (factory rebuilt) Glock 21 Gen 5 is a semi-automatic pistol which fires the .45 ACP round. It has a 4.6" barrel and matte black finish. This includes 3 13-round magazines, full factory warranty (excluding cosmetic issues), 1 red dot plate, 2 backstraps, magazine loader, cleaning kit, hardcase, lock and manual.  This model is optics ready.