It's amazing how the ATF thinks they can just write a letter and make something illegal without having actually passed a law. This is basically what happened with the m855 ban only the flak they took was so intense they had to back down. This letter doesn't seem to align with the actual law which allows for 1/4 oz or less if HE in rounds 50 cal or smaller and without and justification they have decided that tracers and spotter rounds are not ammo... This is the only defends i know and feel like it would be hard to enforce, especially considering you can still purchase new Manufacturered tracer ammo. Not sure about spotter, incendiary or HE round, can't seem to find new production, not sure if that's something the ATF has cracked down on, there is no demand if companies and just choosing not to sell to the civilian market. Either way people, buy, sell, possess and shoot the stuff everyday and the ATF doesn't have the man power to track down millions of rounds of the stuff. Just cross your fingers for a trump victory which should help keep the ATF in check.