Ammo Inc. Stelth Ammunition TMC (Total Metal Coating) has a fusion of proprietary hyperclean technology, precision standards, and leading suppressor manufacturer collaboration. The stelTH line was designed from the ground up with both decibel drop and cleanliness in mind. So whether your mission is tactical training, a predator night hunt, or a clandestine operation, when silence is paramount, go stelTH. This ammunition is new production, non-corrosive, in boxer-primed, reloadable brass cases.