Anderson's AM15 Optic ready Firearm is chambered in .223/5.56 comes with a 16 Chrome Moly Vanadium Steel M4 contour barrel with a 1-8 twist. It features forged 7075 T6 receivers, A2 Hand Guard, 6 position butt stock, A2 pistol grip, A2 Flash Hider, Anderson s proprietary 17-4 stainless steel match grade Trigger and Hammer, Standard Charging Handle, Single point sling mount, and one thirty round magazine. This firearm features the RF85 coating, firing with 85 percent less friction, a 23 percent faster action, and cleans up with soap and water no oil is needed.