GM Tatico does a review of the Umarex MP5 SD6 SMG AEG that starts with an unboxing, showing the gun, manual, magazines, cleaning rod, and Allen key. They highlight the gun's features, including a retractable stock, ambidextrous selector, and adjustable hop-up, while noting the hop-up's tendency to dis-regulate. They also go over the details the gun's specifications, such as its length, inner barrel, weight, and battery type. Testing shows an FPS of 360-350, suitable for CQB, with a suggestion to upgrade the bucking and inner barrel for higher FPS.