5.56x45mm NATO
| Caliber | 5.56x45mm NATO (118 guns) |
| Length | 2.26" (57.40mm) |
| Types | Standard Pistol(8), Rifle(64), Carbine(43), Machine Gun(3) |
| Manufacturers | ArmaLite(8), Bushmaster(24), Colt(5), Colt Defense(8), FNH(8), H&K(6), IWI(9), Kel-Tec(5), Olympic Arms(21), Para USA(2), Ruger(1), S&W(12), Sig Sauer(6), Steyr(3) |
| Rating |
Has the same dimensions as the .223 Remington.