Mach Sakai goes over the Yonezawa Walther MPL, a hybrid airsoft gun that uses both gas and electric power. He notices the gun's light feel, a 22-round magazine with a 70-round reserve tank, and a unique two-stage safety lever and selector switch that allows for both semi-automatic and full-automatic modes. His video review also covers the gun's physical features, shooting performance, including muzzle velocity and firing rate, and some potential issues like double-feeding and gas pressure drops with rapid firing.