quality:correction
Compact assault rifles

Following the adoption of the M16, carbine variants were also adopted for close quarters operations. The AR-15 family of weapons served through the Vietnam War. However, these compact assault rifles had design issues, as "the barrel length was halved" to 10 inches (250 mm) which "upset the ballistics", reducing its range and accuracy and leading "to considerable muzzle flash and blast, so that a large flash suppressor had to be fitted". "Nevertheless, as a short-range weapon it is quite adequate and thus, its caliber, is classed as a submachine gun." Other compact assault rifles, such as the HK53, AKS-74U and the Daewoo K1, have been made and they have also been called submachine guns.