The grey mags do look more authentic, and they work very well, but the green followers they have in them did not work the bolt hold open actuator in my rifle. I had my three older mags exchanged for the evolution type, and all was good. The waffle look of the evolution mags have grown on me, plus they are more substantial in construction, especially the feed lips which are metal.
Webley Vulcan .22, Webley Tempest .177, Beeman Kodiak .25, Beeman R9 .177, Weihrauch HW30 .177, Slavia 618 .177, Colt Commander .45ACP, Browning Hi-Power 9mm, Bushmaster AR-15 5.56/.223