Finally, after a couple year wait for XProducts to release them, we have the HK 93,33,53 - 50 round drums in stock and ready to ship! Will fit all in spec firearms made to German HK magwell specs. Works with all 556, 223 & .300 BLK HK 556/223 HK93, 33, 53 firearms. Made from billet rather than the usual castings as they are a one time deal we are told. These are a special run, HK Parts exclusive item, so be sure to check them out!