We have Bill Ruger to thank the term high capacity mag. He pretty much coined it and worked with the Clintons on the first assault weapon ban in 94. Helped prevent his top selling rifle from getting on the ban list. More to it but time makes it blurry and me forgetful.Although it uses the same ammo, has the same rate of fire, and can uses magazines with the same capacity as an AR-15, it's not on the most recent "list"of proposed weapons to be banned.
Makes me mad when I think about it and the selling out because I like Ruger firearms.