HK MP5 22 Long Rifle 16in Black Semi Automatic Modern Sporting Rifle - 10+1 Rounds - The MP5 submachine gun is easily the most famous of all HK gun designs. Now you can get the authentic look, feel and features of the legendary HK MP5 in a semi-automatic .22 LR. HK has partnered with Umarex of Germany to bring you the only HK-authorized rimfire versions of the legendary MP5. So, whether you're looking for an economic, but serious sub-caliber trainer, or just want the coolest .22 LR fun gun on the range, look no further.