The whole point of the MP5 is to have a small, easily concealable, maneuverable weapon. And while H&K’s design is pretty good, it can be so much better. Lighter magazines that don’t jam. Controls like the common AR-15, not a completely new platform that soldiers need to familiarize themselves with and train for. Mission configurable in the field. Easy to disassemble. And, most important, actually making the damn things accurate. If memory serves, the acceptance test for an MP5SD was a mean radius of 8 inches at 100 yards for the shot pattern, which is nowhere near the accuracy you’d want. The MPX fixes all of these things, and looks awesome doing it. We’ll have a review when they finally hit the civilian shelves, but for now enjoy the full auto goodness.