This is an Olympic Arms OA-96 which, as the name suggests, was developed during the '94-'04 AWB era. This is essentially a .223 AR pistol with a fixed, 30-rd magazine that still retained a threaded muzzle, pistol grip, and other features during the assault weapons ban. To reload it, you hit the button on the back, hinge the upper open, and reload the magazine using stripper clips or other charging methods.
I don't think this has ever been shot, and I purchased from a buddy on a whim a few months back before admitting I just really won't ever take it out to the range over my other ARs.
In great condition, just a few safe scuffs from being stored for almost the last 30 years.
$800, FTF at the New Braunfels Buc-ee's. Buyer must complete Bill of Sale and be legal to own a firearm.