Frommer Stop

The Frommer STOP (Szabályozott Öntöltő Pisztoly, StÖP) is a Hungarian semi-automatic pistol which was manufactured by small arms firm Fegyver- és Gépgyár (FÉG) in Budapest. It was designed by Rudolf Frommer and adopted by the Austro-Hungarian Army in 1912 as the Pisztoly 12.M alongside the Steyr-Hahn. The STOP was also sold to Bulgaria, Germany and Turkey for service use. The pistol was manufactured in various forms from 1912 to 1929 and was also used by the Ottoman Army and the Royal Hungarian Army, seeing action in World War I and World War II. Its design features a long frame with a 4-groove rifled barrel using a long-recoil, straight-pull, rotating bolt locking action with the barrel and bolt employing independent return springs in a cylindrical housing above the barrel. Unloaded weight is , and the detachable box magazine holds seven rounds of 7.65 x 17mm Frommer Long (essentially a higher velocity .32 ACP round). The model designation "STOP" is often mis-attributed as solely a marketing allusion to the pistol's stopping power as used with commercial advertising after the war but was originally an acronym, szabályozott öntöltő pisztoly, related to the unique bolt hold (stop) mechanism employed in the long-recoil action. Such a complex locking action is not necessary for .32 ACP and .380 ACP cartridges and later FÉG Frommer 29.M and 37.M pistols used more conventional simple blow-back actions.

The pistol incorporated design features of Frommer's earlier sidearm designs, including the M1901 and M1904, both of which were inspired by the Roth–Theodorovic pistol. The Frommer Stop was chambered in a proprietary 7.65mm cartridge which had a crimp in the shell casing at the base of the bullet. This round achieved a velocity of from the gun. Using his earlier pistols' basic long-recoil locked action, Frommer redesigned it with a more compact and conventional layout for the Model 1910 and patented it in 1911 for use with the STOP. A 9mm Frommer (a higher velocity .380 ACP (9mm Kurtz)) variant of the STOP was produced from 1919 to 1929 and was adopted by the Royal Hungarian Army under the name Pisztoly 19.M and saw service during World War II though the STOP 19.M pistol was never formally adopted as a service pistol by any nation other than Hungary. A shortened 57mm barrel version of the 12.M STOP called the "BABY" was manufactured alongside the STOP for commercial sale as a pocket pistol. A final limited production .380 ACP export-only version of the STOP was reportedly manufactured in 1939 as the 39.M. The last variants of the Frommer pistols were the FÉG Pisztoly 29.M and 37.M which used simple blow-back mechanisms chambered in 9mm Kurz and were unrelated to the STOP design.

Machine pistol variant

Beginning in 1916, the Austro-Hungarians made several attempts to replicate the Italian Villar Perosa aircraft submachine gun. In 1917, FÉG converted two Frommer Stop pistols into automatic machine pistols with 25-round magazines and fitted them side-by-side to a central mount with a tripod. The machine-pistols were mounted upside-down, and the magazine catches were enlarged for easier unloading. The triggers were removed, and the guns were operated by a set of rods connecting to the spade grips of the mount, which directly engaged the sears. The barrels were lengthened and the cocking mechanisms were redesigned as protruding arms, which were engaged by a set of hinged retracting levers.

This submachine gun was designed to be used as a light machine gun like the Villar Perosa. Although it was tested by the Austro-Hungarian Army, it was not successful and was only made in small numbers. The Frommer machine-pistol was succeeded later in 1917 by the more successful Steyr Arms Sturmpistole, (not to be confused with the German World War II flare and grenade launcher,) a direct copy of the Villar Perosa.

Users

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See also

* Roth–Steyr M1907

References

External links

Frommer double barrel machine gun

Frommer M.17 palm fired pistol
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{{WWIAus-HunInfWeaponsEquipment

.32 ACP semi-automatic pistols
.380 ACP semi-automatic pistols
World War I submachine guns
Machine pistols
Long recoil firearms
Semi-automatic pistols of Hungary
World War I Austro-Hungarian infantry weapons
World War II infantry weapons
Weapons of the Ottoman Empire
Fegyver- és Gépgyár firearms