It seems to depend on what ATF regulation you want to look at. A lower receiver, according to the ATF, is a firearm and needs to be regulated. What these gun b

It seems to depend on what ATF regulation you want to look at. A lower receiver, according to the ATF, is a firearm and needs to be regulated. What these gun buyback stunts have further illustrated is just how much of a patch work mess the gun laws have become.