Army M4 carbines getting full-auto capability
Washington (UPI) May 28, 2013 - The U.S. Army's M4 carbines are in the process of receiving new, thicker barrels for better weapon performance if used in automatic mode. The barrels in the M4-1A configuration of the rifle weigh 7.74 pounds - compared to the M-4's 7.46 pounds - and absorb more heat. The weight comparisons include the back-up iron sight, forward pistol grip, empty magazine and sling, the Army reported ... more
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