Alexander of Red Army Airsoft features a Tokyo Marui MP7A1 that has been customised to be HPA-powered. This uses the PolarStar Jack Drop-in Kit from Bingo Airsoft Designs, Bullgear Hop-Up, and the Nine Ball Long Inner Barrel for Tokyo Marui MP7A1 AEG... "You have long asked and I finally got my hands on making a video about our MP7 HPA."