This new Glock 17 Gen 4 pistol fires the 9mm round. It has a 4 1/2" barrel with an overall black finish. This semi-auto pistol has an under barrel rail and a rough textured grip. This pistol comes with 4 additional backstraps to change the size of the grip. It also comes with three 17 round magazines, magazine loader, cleaning brush & rod, hard case, and lock.