Ok guys, I have a 700 police in 223, I was looking at putting it in a Mcmillan A5 stock, when I was talking to them, they asked about bottom metal, well I was at a loss, instead of ordering it with the standard hennaed floor plate, I thinking of a box mag. so the question, will HS pro units work with Mcmillan stocks? also, if I do it in 223, and in a few years I want to rebarrel to 308 or 6 x 47 can I still use the same bottom metal? is the HS a good unit to be looking at? Let me know please