I have a 5-cartridge metal AR mag. I'd like to trade it for a poly mag of the same type. Bigger is OK. Edmonton

I have a mag to trade.

He defrauded me out of $2300 when I tried to buy something from him on a site similar to this one. Any information you can give me that I can give to the police, so that they can track him down and charge him, will be helpful. Thanks in advance. Apparently his address is, or was, in Hamilton.