At First Posted By tony_k: Not commercial guns, because Colt had a coverage of not promoting MGs to private events. By law they could not, since they under no circumstances compensated any federal excise tax on their own MGs. That saved them close to ten% per gun. (FET is paid https://lorenzowxwtv.ampedpages.com/colt-m16a1-for-sale-things-to-know-before-you-buy-58442793