Don't forget the commercial aspects of it. The maker/inventor's name has little to do with the type/nomenclature of gun with which you can fire the ammo. IE .223 Remington ammunition fired in a Colt AR15 lower with a Bushmaster upper and an atttached Colt 5.56 NATO stamped barrel. As far as I know (which granted, is quite limited), Colt never has produced Remington .223 ammo, Remington has never made an AR15, 223. works fine in a NATO 5.56mm barrel which is not the specs for NATO 5.56. And Bushmaster has never made a round of Ammo.
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