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 (in en). Weaponsystems.net. Retrieved 2025-01-13.