Walther PPK
The Thunder 9 shares little in common with the other handguns in the company's product line. While the smaller Thunders are blow-back pistols similar to the Walther PPK, the Thunder 9 is a full-size, short-recoil handgun to handle the greater pressure of the 9mm Parabellum cartridge. The gun bears some resemblance to the Walther P88 pistol.