The Hatsan Jet I Convertible PCP Pistol does more than the typical air pistol because it can transform into an air rifle with the help of the included synthetic stock. With lead pellet velocities up to 788 FPS in .177, it delivers the performance and power needed for target practice, plinking. What makes this pellet pistol different than most is that it includes a removable stock that attaches to the top and bottom of the rear of the textured ergonomic pistol grip so it can be used as a light and maneuverable air pistol or a comfortable carbine-style air rifle with a stable hold and additional control.