Dod (328) Mp4
The M4 is a shorter and lighter variant of the M16A2 rifle, with 80% parts commonality. The M4's maneuverability makes it beneficial for non-infantry troops (vehicle crews, clerks and staff officers), as well as for close quarters battle. The M4, along with the M16A4, has mostly replaced the M16A2 in the Army and Marines. The U.S. Air Force, for example, has transitioned completely to the M4 for Security Forces squadrons, while other armed personnel retain the M16A2. The U.S. Navy uses M4A1s for Special Operations and vehicle crews. However, the M4's shorter barrel reduces its range, with its rear iron sights integrated in the (removable) carry handle only adjustable from 300 m (328 yd) up to 600 m (656 yd), compared to the M16A2 rear iron sights integrated in the fixed carry handle, which can reach up to 800 m (875 yd).
Dod (328) mp4