AR would be my primary also, but these would be a cheap way to arm friends and neighbors if needed.So basically never... I heard through the grapevine that they stuck with 10 round mags to avoid any "assault weapon" classification, which if true, is a stupid freaking reason. Either way, the price on these is so cheap that I could probably get over the whole incompatibility issue. I have seen them for $269 a couple of times, so maybe I'll end up grabbing one as a plinker.
If SHTF, it's an M4 clone - all day every time.