Finished product of the "Doing the Retro Thing Again" thread.
The display is a prototype of a display case I designed/built for a USAF GAU-5/A/A Commemorative AR project I started with two other partners in 1988. At the time, I had an FFL and a manufacturer's license. The project was killed by the Roberti-Roos AW ban after Patrick Purdy shot up a Stockton CA school yard.
The upper is Colt SP1 with a chrome slick side BCG from Brownell's for easrly look, as is the original 3 prong flash hider. The furniture is early pre-trapdoor stock USGI mottled from seller "Com Block" on gun broker. Sort of a late 602 or early 604, though the lower is not correct.