The missiles are separately regulated, and likely not legal for private ownership. Missiles and high explosives are licensed and legislated for separately.

Any weapon that’s part of a standard infantry soldiers load out should be available, new from the manufacturer. I don’t have a problem with the background checks that are required for a class 3 weapon, like an m16 or a Thompson sub machine gun (https://dealernfa.com/product-category/machine-guns/all-tran...), but as it stands only wealthy people can still afford to purchase them.