Midway already have these listed on their site (since Midway, Battenfeld, Caldwell, etc. are all in bed together anyway) at a price of $79.99 (plus their @#$% S&H it'll get you to nearly $100 shipped), and that apparently includes an "ammo transfer tray" to assist with ammo that's packed tip-down or otherwise not ready to chuck in this gadget right off the bat.
That's a hell of a lot of money for a mag loader of ANY flavor unless you are truly running and gunning through a truck-load of ammo in a short period of time. Even for 3-gun purposes...I'll pass, but there may well be some merit to an intensive carbine class over a matter of a few days when you'd be far better off on the line training/shooting than off to the side reloading mags for an extended period of time.
Unfortunately, I'm nearly certain without even having laid eyes/hands on these yet that they'll likely suffer from the same generally inferior quality that many of the products made by Battenfeld, Caldwell, Wheeler Eng., A&B, etc. Some of their ideas, at least in concept, are really pretty handy, but their execution is...well...lacking at times thanks to Chinese production and seemingly poor QC at least at times.
For anyone interested...here the Midway link where you can get on the notify list if you are so inclined:
Caldwell Mag Charger AR-15 Mag Loader