Bersa pistols are made in Argentine by the Bersa S.A. company. Thunder pistols are available in many versions. Thunder series pistols are compact and handy, and offer significant capacity with major pistol calibers.| Thunder 9 and 40 | Thunder 9 and 40Mini / Ultra-Compact | Thunder Ultra-Compact 45 | |
| Type | Double Action | ||
| Caliber | 9x19mm Luger and .40S&W | 9x19mm Luger and .40S&W | .45ACP |
| Weight unloaded | 870 g | 765 | 780 |
| Length | 192 mm | 165 mm | 173 mm |
| Barrel length | 110 mm | 83 mm | 92 mm |
| Capacity (rounds) | 17 (9mm) or 13 (.40) | 13 (9mm) or 10 (.40) | 7 |