I got one of the prototypes of those but did not consider it ready for prime time. The Skunkworks one does work but I can load just as fast by hand. Recently got the McFadden Lightning Grip Loader (already had their Ultimate Clip Loader pistol mag loader for over 4 years and it is the best for Ruger/Browning mags) and it works way faster than I can do by hand, around 10 seconds for a 25 rd mag. Also got the adapter for CMMG/BDM mags for my dedicated .22 AR upper. Also works well.