This new Glock 21 Gen 4 pistol fires the .45acp round. It has a 4 1/2" barrel with an overall matte black finish. This semi-auto pistol has an under barrel rail with a rough textured grip. This pistol comes with 2 additional backstraps to change the size of the grip. It also comes with three 13 round magazines, magazine loader, cleaning rod & brush, hardcase, and lock.