M4A1 Carbine Specifications Origin: United States of America Manufacturer: Colt Caliber: 5.56mm NATO Magazine Capacity: 30 rounds Maximum Ammunition Capacity: 90 Effective Range: 685 meters (CS unit) Weight [EMPTY]: 3.22 kg Projectile Weight: 4 kg Muzzle Velocity: 2900 feet/second Muzzle Energy: 1570 joules