37MM Disco Ammo ready to load into your 37MM launcher. Signaling type ammo for 37MM launchers. These 37MM Signaling Rounds produce a mixed burst of firefly stars and regular stars to create a twinkling effect. Fully re-loadable with our 37MM Reloading  Kits.  With each 3 Round Pack you receive loaded rounds and 3 re-loadable casings which are $20.00 each, a $60.00 value per Ammo Pack. Made in U.S.A. 3 Round Pack.