Serial End if partial year of production. This page is an effort to assemble a comprehensive estimate of just how many AR pattern rifles have been built in the US since it first became commercially available in In those early years of the Black Rifle, Colt was the only manufacturer with civilian sales starting in at Serial SP Below is a table of rough production numbers for the first 19 years of the 'Black Rifle', to give you an idea of how well it sold.
