Ripsnortr
20g
Looks like they have decided to reverse earlier bans on aftermarket magazines.
http://www.guns.com/pentagon-army-tacom-lcmc-allows-magpul-pmags-non-usgi-magazines-8627.html
http://www.guns.com/pentagon-army-tacom-lcmc-allows-magpul-pmags-non-usgi-magazines-8627.html