http://www.gunsandammo.com/home-featured/the-real-history-of-the-assault-weapons-ban/
I know you’ll just love this source but the list should be accurate and the specifics of the pistol in question that banned its further production for sale in the US post 1994 were magazine capacity and threaded barrel. I bought this gun in 1992 and liked it so well I went to get another one in the fall of ‘94 and they were gone and weren’t coming back. It was banned because of its features.
do you still own the firearm ? I would like to shoot it. it looks like a lot of fun.