M16 Rifle

M16 is the assault rifle which is a competitor of the AK-47. This is standard issue shoulder weapon in the U.S. military. This rifle also favorite rifle on Counter Strike game because it has a very good accuracy. The M16 was effective at ranges of less than 400-460 meters, the range within which United States experiences in World War II and Korea had indicated that small arms engagements would occur.
The M16 is a lightweight, 5.56 mm, air-cooled, gas-operated, magazine-fed assault rifle, with a rotating bolt, actuated by direct impingement gas operation. The rifle is made of steel, 7075 aluminum alloy, composite plastics and polymer materials.

The U.S. Air Force's rifle, the M16, and the United States Marine Corps and Army rifle, the XM16E1, were the first versions of the M16 rifle fielded. Soon, the U.S. Army standardized the XM16E1 as the M16A1 rifle, an M16 with a forward assist feature requested by the Army. All of the early versions were chambered to fire the M193/M196 cartridge in the semi-automatic and the automatic firing modes. This occurred in the early 1960s, with the Army issuing it in late 1964. Commercial AR-15s were first issued to Special Forces troops in spring of 1964.

The M16A3 rifle is an M16A2 rifle with an M16A1's fire control group (semi-automatic fire, automatic fire) and removable carry handle mounted on a flat top receiver, used only by the U.S. Navy.

The M16A4 rifle was standard issue for the United States Marine Corps in Operation Iraqi Freedom; it replaced the M16A2 in front line units. In the U.S. Army the M16A2 rifle is being supplemented with two rifle models, the M16A4 and the M4 carbine as the standard issue assault rifle. The M16A4 has a flat-top receiver developed for the M4 carbine, a handguard with four Picatinny rails for mounting a sight, laser, night vision device, forward handgrip, removable handle, or a flashlight.