Re: AW mags and AX mags
The only difference is the front locking lug that AI added to the AX magazine. It will prevent the AX mags from inserting into the AW magwell. While AW mags will fit into the AX, if you have the latter rifle system and need more magazines for it, buy the actual AX mags - they should lock up better, particularly if you're doing any positional shooting that might put pressure onto the inserted mag body.
YMMV, etc.