The M4A1 AR15 style firearm features the RIS II picatinny quad rail, which has been in use by US Special Operations Command (SOCOM) for the SOPMOD Block II program since 2005. The M4A1 is built around a 14.5 inch Cold Hammer Forged M4 Profile barrel with a permanently attached Daniel Defense Flash Suppressor. The independently ambi GRIP-N-RIP Charging Handle accommodates left- and right-handed shooters. The M4A1 is available with an FDE rail as well as our Mil Spec + Cerakote. This M4 carbine also comes with the ergonomic Daniel Defense Buttstock and Pistol Grip.