Look for the Unique Lines and Distinctive Shape of the P99 replica as a TRADEMARK of Walther.The P99S semi-auto blank firing pistol is an exacting replica of Walther"s P99 firearm. Use Umarex"s 9 mm blank cartridges for extra loud report. - Caliber: 9 mm PAK- Brand: Walther- Ammo Type: 9 mm PAK Blank Cartridge- Features: Holds 15 rounds