Umarex MP5 K-PDW, .177 Caliber BBs, 7 Barrel, Black, 40Rd, 400 Feet Per Second 2252330 Heckler & Koch's MP5 is a classic. The compact submachinegun redefined the way we think about personal defense weapons. Now there's an exacting replica of the original that provides shooters with a great training tool that is also a blast to shoot. The HK MP5K-PDW air gun features serious velocity: 400 fps. The semi-automatic action runs from a high capacity 40-shot mag. The BB repeater even has a realistic recoil action. A foldable stock, forearm grip, and drop-out magazine make this one of the most exciting and fun to shoot BB air guns ever created.