LOOK FOR the Unique Lines and Distinctive Shape of the P99 replica as a TRADEMARK of Walther. This compacted version of the Walther P99 is modeled after the gun used by special forces as their back-up pistol. This popular CO2 powered BB air pistol captures realism with its BLOWBACK, semi-automatic action and features a Picatinny mount to allow easy installation of accessories such as a Walther Laser Sight. A 12g CO2 cylinder loads in the back of the grip and the BB magazine releases with the push of a realistic magazine release lever. The recoil action made live by the power of CO2 kicks the slide back giving you that oh-so-realistic feel. A great pistol for target games and owners of the P99 Compact or similar firearms.