The 715T can only group what it can feed and from what I have seen with several fellow club members' 715T's, it won't feed a lot. The 10/22 and the stock cost me $350, but I ordered mine from Brownells. The mags I'm using are Butler Creek steel lips in smoke, which I would have used in any configuration. The OP wanted an M4-looking .22LR rifle for a reasonable price. I gave him an alternative that costs about the same (hell, if you source the stock locally, it'll only add $50-60 to the total build price), will function reliably and isn't a mission to strip for detail cleaning. If the OP wants to go dead-accurate in that price range, he might as well go for a bolt gun. If the goal is tactical configuration with rock-solid reliability and ease of maintenance, 10/22 platform's the ticket.