Frommer Stop

The Frommer Stop was a Hungarian semi-automatic pistol. It was designed by the Hungarian firearms designer Rudolf Frommer in 1911, adopted by the Royal Hungarian Army under the designation 12 M. pisztoly in 1912, and produced by FÉG from 1912 to 1929. In 1919, after the dissolution of Austria-Hungary, this pistol was adopted again by the new Royal Hungarian Army under the designation 19 M. pisztoly. Around 365,000 pistols were produced. This pistol is notable for its unusual design, and it has a grip safety.

This pistol fires from a closed bolt and uses a long recoil operation, a locking system that uses a rotating bolt, and a hammer-firing mechanism with a single-action trigger.

The basic variant (used by the Royal Hungarian Army) was chambered in the 7.65 mm Frommer cartridge (a 0.32 in ACP cartridge with a larger gunpowder charge), and another variant was chambered in the 9 mm Frommer cartridge (a 0.380 in ACP cartridge with a larger gunpowder charge). The 7.65 mm variant has a magazine of 8 cartridges, and the 9 mm variant has 7 cartridges. An additional cartridge can be loaded into the chamber.

Specifications of the 7.65 mm variant according to a 1925 Hungarian manual:
The length is 160 mm.
The width is 22 mm.
The height is 110 mm.
The barrel length is 100 mm.
The mass of the unloaded pistol without a magazine is 550 g.
The mass of the unloaded pistol with an empty magazine is 580 g.
The mass of an empty magazine is 30 g.