A shortened variant of the M16A2 rifle, the M4 carbine provides the individual soldier operating in close quarters the capability to engage targets at extended range with accurate, lethal fire.

Army and Air Force personnel were instructed in the use of the ACR rifles, and the M16A2–which had been the standard service rifle since 1982 – was used as a control group. The Army put the ...

Webb County Sheriff Martin Cuellar unveiled 15 enhanced rifles for the patrol division, authorities said Thursday. “The existing M16A2 rifles are heavy and with a barrel length of 20 inches.