In AZ. a friend of mine spent a few bucks at one.There were many good deals,I was told authentic colt peacemaker type pistol 6 shooters were being auctioned off between $800-1500 after a much higher asking price.I was wondering,he bought a sks,w/removable mag,and a folder that looks aftermarket. A SA-Rem1100 12ga,w/protruding pistol grip,fixed buttstk.and mag extension to @ 7 or 8rnds,(I forget which).Are these firearms in LEGAL CONFIGURATION?....[?]

A lot would depend on when the rifles were originally purchased and when they were configured in the manner they now are. Also, it would depend on local/state laws.

So, they maybe perfectly legel in AZ but, I'm sure, strictly forbidden across the boarder in the PRK.