Probably about 1989 or 1990. 1987 would have been too early, and even in 1988, they were doing transitional A2 models, with SP1 uppers, or A1 upper with a Brunton Bump. I did not see factory A2 upper carbine generally available until 1989 or 1990. NICE! If I lived elsewhere, I'd be trying to talk you out of it!