Daniel Defense M4A1 5.56mm NATO 16in Black Anodized Semi Automatic Modern Sporting Rifle - 10+1 Rounds - The Daniel Defense M4A1 features the M4A1 RIS II, which has been in use by US Special Operations Command (SOCOM) for the SOPMOD II Weapons System since 2005. The M4A1 features a 16in Cold Hammer Forged M4 Profile barrel with a permanently attached Daniel Defense Flash Suppressor. The new independently ambi GRIP-N-RIP Charging Handle accommodates left and right-handed shooters and is engineered for suppressed fire, with anti-gas features that redirect gas flow upward and away from the face and operator. This rifle also comes with the rugged and comfortable Daniel Defense Buttstock and Pistol Grip. California compliant design prevents the magazine release button from being engaged while fully assembled, locking the magazine into the receiver. To release the magazine from the rifle, the shooter will be required separate the upper from the lower by pulling on an extended (rear) takedown pin with an attached cord to make the process easier. Once the magazine has been released the rifle can be re-assembled and shot once again. H Buffer 6 Position Mil-Spec 7075-T6 Aluminum Receiver Extension Daniel Defense Full-Latch Impact Plastic Case Made In The USA