The new Steel Force is a 6-shot burst M4-style BB machinegun that makes shooters smile. This addition to the Umarex tactical line-up has practical applications for training, but is also geared for recreational shooters. The Steel Force's magazine houses side-by-side CO2 cartridges. The BB reservoir above the hand guard holds 300 shots. The gun operates in single action or in full-auto six-shot bursts, and all of the features, from the safety to the charging handle, all work as they would on an M4. And that may be the most useful feature of the new Steel Force. While experienced shooters will feel right at home with the gun, its collapsible stock makes this the perfect way to safely introduce younger shooters to the AR platform.