Umarex Pyro Tactical Fireworks Whistle Cartridges - 50 pcs.

The Umarex Pyro whistle cartridges - 50 pcs. are extra loud rocket whistle projectiles. Caliber: 15 mm The signal effects may be fired with a launching cup (additional barrel) in caliber 15 mm. In calibers 9 mm PA blank and 9 mm R, the PTB test number on the launching cup (additional barrel) must match the PTB test number on the blank firing or signal weapon! They may only be fired from approved blank firing or signal weapons with PTB mark using blank cartridges of calibers 6 mm Flobert, 8 mm blank or .315 blank and a launching cup in caliber 15 mm.