M16A2
The M16A2 is a version of the M16. It is Selective Fire with the options of Safe, Semi, and Burst (3 at a time).[1] That and the barrel being shaped like a tube, not a triangle, is the only major difference.
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M16A2 Media
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 the Vietnam War
Video of Rifle 5.56mm, XM16E1, Operation and Cycle of Functioning
"Colt M16A2". Weaponsystems.net. Retrieved 2025-01-13.