I grew up in the DC area and used to shoot at Clark Bros (still out in the boondocks off of 29?)--what a wild place! I have fond memories of latino narcos and leather clad punk rockers with purple hair showing up with AK's and sweeping the firing line with their muzzles.
Still in business? I thought they shut down or went out of business some years ago. Back then I had an SKS and a streetsweeper shotgun--a cyclinder magazine fed semi-auto shotgun which unfortunately got legislated out of my possession. If there's a weapon guaranteed to get you looks--that's one of em.