M4A1 — specifications, caliber, stats, review, photos | WeaponAtlas
M4A1 is a U.S. military carbine chambered in 5.56×45mm NATO, introduced in 1994. The standard model uses a 14.5-inch barrel, a collapsible stock, and a direct-gas AR-15-pattern operating system.
| Manufacturer | Colt's Manufacturing Company |
|---|---|
| Year introduced | 1994 |
| Caliber | 5.56×45mm NATO |
| Weight (unloaded) | 3.324 kg |
| Length | 799 mm |
| Barrel length | 371 mm |
| Magazine capacity | 30 rounds |
| Rate of fire | 825 rpm |
| Muzzle velocity | 820 m/s |
| Effective range | 400 m |