At first Posted By tony_k: Not commercial guns, due to the fact Colt experienced a policy of not providing MGs to non-public parties. By regulation they could not, because they never ever compensated any federal excise tax on their MGs. That saved them around 10% for every gun. (FET is https://ragingbookmarks.com/story18506610/not-known-facts-about-colt-combat-unit-rail-gun-45