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M4 carbine

Type Carbine, assault rifle
Place of origin United States
Cartridge 5.56×45mm NATO
Caliber 5.56 mm (.223 in)
Barrels 1
Action Gas-operated, rotating bolt (Direct impingement)
Rate of fire 700–950 round/min cyclic[4]
Muzzle velocity 2,900 ft/s (880 m/s)[5]
Effective firing range 500 m[6]
Feed system 30-round box magazine or other STANAG magazines, 100-round double drum magazine
In service 1994–present
Used by See Users below
Wars
1998 Kosovo war
War in Afghanistan (2001–present)
War in Iraq (2003–2011)
2006 Lebanon war
Mexican Drug War
Gaza War
Colombian Armed Conflict
Operation Enduring Freedom
2008 South Ossetia war
Syrian civil war
Battle of Arsal
2013 Lahad Datu standoff[1]