T320 Signaling Device is a 37mm flag launcher designed for signal flares, Smoke and bird banger rounds. this design is similar to the military version known as the GLM or M320. these now come with a German flip down front grip, sights , 416/ G36 gas block adapter and pin along with a German surplus adjustable stock. WARNING all NFA rules apply, do not attempt to load or shoot anything other than standard 37mm civilian approved flares, etc.