Colt AR Upper Receiver Conversion 1994
Colt was still legally allowed to sell full featured uppers during the "Assault Weapons Ban" of September 1994. They were considered replacement parts so long as they were mated to a receiver that pre-dated the AWB. The upper conversions were available in 5.56 NATO 1:9 or 1:7 twist, 16 or 20 inch with the upper receiver stamped "Colt 223". Also available in 7.62 x 39 with the upper receiver stamped accordingly. Lowers with the telescopic butt stock could also be purchased during the initial AWB but could not be mated to an upper with a flash hider or bayonet lug.