Another blast from the past as Hyperdouraku features the JAC Battle Master... "1985 - A revolution hit the airsoft world with the dawn of the new year. JAC released the Battle Master, the world's first fully automatic gas gun that fired BBs using gas. Equipped with a BV (Bullet Valve) fully automatic unit developed by Asahi Firearms, it used CFC-12, a refrigerant gas commonly used in spray cans at the time, as its power source. Its appearance was like that of a futuristic weapon.