This new Glock 40 Gen 4 pistol is chambered in 10mm. It has a 6" barrel with an overall black finish. This semi-auto pistol is the MOS (Modular Optic System) set up that comes with 4 adapter bases. These bases allow the user to mount different optics on their Glock pistol. This pistol also comes with 4 back straps, a bore brush & rod, a magazine loader, a manual, lock, hard case, and three 15 round magazines. This pistol is perfect for the outdoor person, hunter and sport shooter. It is designed to give the handgun hunter the ultimate choice in semi-automatic gaming pistol and has proven to be more than capable of taking down game such as Whitetail Deer, Russian Boar and even Feral Hogs.