If this really works then it is a game changer for the AR15 system.
http://www.primaryarms.com/rze-mag-001b/p/rze-mag-001b/
[video=youtube;HgYzdE9Y3Lg]https://www.youtube.com/watch?v=HgYzdE9Y3Lg[/video]
http://www.primaryarms.com/rze-mag-001b/p/rze-mag-001b/
[video=youtube;HgYzdE9Y3Lg]https://www.youtube.com/watch?v=HgYzdE9Y3Lg[/video]