I was at the gun shop last night for a FNRA meeting and spied on the rack an AR that I hadn't seen before. Looking at it closer it was configured pre-ban, collaposable stock, bayo lug, goofy 5.5" flash hider on the really short barrel. I wasn't too stoked about that. Anyhow, the lower looked real nice, the upper a bit worn and the finish was a 'lighter' black than the lower. The barrel is marked 5.56 in front of the sight base. The lower has 'SWG' in a stop sign looking shape. What does that mean anyhow? The model was: CAR-AR. I checked the sn on the Oly site, it was an early 91 build. WHat can you tell me about it? Is the upper original to the lower? What about the color difference? Given it's slightly beat up condition, what's it worth? Thanks for the opinions/info.