The M16 rifle is a family of assault rifles adapted from the ArmaLite AR-15 rifle for the United States military. The original M16 rifle was a 5.56×45mm automatic rifle with a 20-round magazine.
M16A2, multi-sided view
From top to bottom: M16A1, M16A2, M4A1, M16A4.
A Marine of the 3rd Battalion, 1st Marines cleans his XM16E1 in December 1967.
Front cover – The M16A1 Rifle – Operation and Preventive Maintenance by Will Eisner, issued to American soldiers in 1969 during the Vietnam War
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.
M16 rifle
…military service as the M16 and in the following year was deployed for jungle warfare operations during the Vietnam War. In 1969, the M16A1 replaced the M14 rifle to become the US military's standard service rifle. The M16A1 incorporated numerous modifications, including a bolt-assist ("forward-assist"), chrome-plated…
An experimental T47 rifle
Two soldiers with M14s at Guantanamo Bay Naval Base in 1962
A rare M14 presentation model, serial number 0010