M14 rifle
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The M14 rifle is an American battle rifle chambered for the 7.62×51mm NATO cartridge. It was accepted as the service rifle of the United States Armed Forces in 1957, with production starting in 1959.
T25 prototype
An experimental T47 rifle
Two soldiers with M14s at Guantanamo Bay Naval Base in 1962
A rare M14 presentation model, serial number 0010
5.56×45mm NATO
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The 5.56×45mm NATO is a rimless bottlenecked centerfire intermediate cartridge family developed in the late 1970s in Belgium by FN Herstal. It consists of the SS109, L110, and SS111 cartridges. On 28
5.56×45mm NATO with measurement, left to right: Bullet, case, and complete cartridge
The 7.62×51mm NATO and 5.56×45mm NATO cartridges compared to an AA battery
Service rifle cartridge cases: (left to right) 7.62×54mmR, 7.62×51mm NATO, 7.62×39mm, 5.56×45mm NATO, 5.45×39mm
5.56×45mm NATO cartridges in a STANAG magazine