Bersa has a proud history. The company was founded in the mid-1950s by three Italian mechanical engineers: Benso Bonadimani, Ercole Montini, and Savino Caselli. Montini worked for Beretta in Italy before he emigrated to Argentina. Initially, the three Italian engineers produced parts for the now defunct Argentine arms manufacturer Ballester Molina. Then they went out on their own to start Bersa.
In 1959 Bersa introduced a .22 caliber pistol, the Modelo 60, which later evolved into the Modelo 62. Both the Modelo 60 and Modelo 62 were produced from a modified Beretta design and both sold extremely well.
As the company grew, it produced many pistol models in increasingly more powerful calibers. Finally, in 1989, Bersa developed and marketed its first full-size combat pistol, the Modelo 90, chambered for the 9mm Parabellum cartridge.
The Modelo 90 was followed in 1994 by the company's most popular models at that time, the Thunder line. Thunder pistols had steel slides, alloy frames, double-action/single-action triggers, and slide-mounted decocking/safety levers. The Thunder 32 and Thunder 380 were blowback designs while the Thunder 9 and Thunder 40 featured a locked breech short-recoil system. Both the Thunder 9 and Thunder 40 came with high-capacity magazines.
Today the Thunder 9 is the standard sidearm of the Argentine Armed Forces, Argentine Federal Police, Buenos Aires Provincial Police, and a number of other South American law enforcement agencies. But U.S. law enforcement officers have never shown much interest in Bersa handguns.