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.

The slide and barrel are high strength steel and the frame is aluminum alloy.
Available finishes are black matte, nickel, and a two-tone with a nickel finished slide and satin black frame.
All the available finishing styles are non-reflective.
The polymer grips are integrated "wraparound" style.
The trigger is double-action for the first shot, single-action thereafter.
The magazine is double stack and the slide remains open after the last round is fired.
The magazine release button can be reversed for left-handed shooters and it has a "round in the chamber" indicator.
It is one of the easiest, if not the easiest, semi-automatic handgun to field strip for cleaning.

The pistol features ambidextrous safety, a decocker activated by the safety lever, emphasized sights, combat trigger guard, an integrated accessory mounting groove in the frame (added after the year 2000, in the Pro, for Professional, version), firing pin block; the pistol will not fire unless the trigger is squeezed all the way back protecting from accidental falling.
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.
The slide and barrel are high strength steel and the frame is aluminum alloy. Available finishes are black matte, nickel, and a two-tone with a nickel finished slide and satin black frame. All the available finishing styles are non-reflective. The polymer grips are integrated "wraparound" style. The trigger is double-action for the first shot, single-action thereafter. The magazine is double stack and the slide remains open after the last round is fired. The magazine release button can be reversed for left-handed shooters and it has a "round in the chamber" indicator. It is one of the easiest, if not the easiest, semi-automatic handgun to field strip for cleaning.
The pistol features ambidextrous safety, a decocker activated by the safety lever, emphasized sights, combat trigger guard, an integrated accessory mounting groove in the frame (added after the year 2000, in the Pro, for Professional, version), firing pin block; the pistol will not fire unless the trigger is squeezed all the way back protecting from accidental falling.
Bersa Thunder 9