Umarex Battle Ground Whistle Signal Effect - 20 pcs.

The Umarex Battle Ground Whistle Signal Effect - 20 pcs are extra loud whistle cartridges with high trajectory. Caliber: 15 mm The signal effects may be fired with a blank firing adapter (additional barrel) in caliber 15 mm. In calibers 9 mm PA blank and 9 mm R, the PTB test number on the blank firing adapter (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 blank firing adapter in caliber 15 mm.