WHITE BOX INFO FROM BIGGERHAMMER.COM
The "White" label is a rare model. When Colt was having deep financial problems in the late 80’s, they had lost the M16A2 contract to FN, they had a lot of parts left over from their DOD contract’s. They started producing a limited run of "combo" labels, if that is an appropriate term, that had Blue label AND Green label features. These are what are known as "White" label guns. They supposedly shipped with a white tag/ id label that separated them from their earlier green label cousins. I remember reading an American Rifleman magazine, from 1990/91?, that had an article about one. The story writer/editor wanted to have a bayonet lug put on his AR15. It had a "semi" M16 production line lower, small front take down screw/pin, standard diameter fire control pins but lacked the bayolug. The white labels are pre blue label but post green label. They start in 1989 and seem to be made for less than a year. Colt has stuck with the Blue label now for 10 years."