I bought a 40 round AR15 magazine from Cabela's just for fun. It was marked Colt AR15 40 round magazine on the package. It was black, with green follower...not the milspec green follower, but a variation of the old follower dyed green. The magazine appears to be a loose copy of the Sterling AR180/AR15 magazine since it appeared to be notched for both guns. I don't have an AR180, so I don't know if it works or not....the magazine was too tall to lock up in my Armalite, so I didn't even get to prove that it was junk. I thought I could salvage the spring and follower to make a frankenmag but both are non standard and junky. The floor plate was blank, meaning it did not have a Colt logo floor plate. The package did say COLT AR15 40 round magazine, though. There are no markings of any kind of these magazines. especially Colt markings. Its possible that he or another switched the floorplates for some unknown reason, possibly to defraud the ignorant?