Gents, Looking to build up a 700 when I get home, starting with a 700 heavy bbl but I want to convert it to a magazine feed. I have read several articles about conversion, as we all know the disinformation on the www is rampant. I thought that one of the police models had a removeable mag, but I can't find any examples of one. Have any of you ever converted a 700? Have seen some that use M14 mags (this would be ideal for me). Thanks in advance.