Frog Engineering got an HPA-powered gas blowback pistol to show to you. The Army Armamanent R601 TTI is a realistic replica pistol made mostly of metal with a green gas blowback system that simulates firing for a lifelike experience. This Army Armament airsoft gun features improved grip texture, sights, safety levers, and a Picatinny rail for customization, all while offering good performance with an adjustable hop-up and a magazine capacity of 28 rounds.