Škorpion vz. 61

Infobox Weapon
name=Škorpion vz. 61


caption=The early vz. 61 with stock deployed.
origin=flag|Czechoslovakia
type=Submachine gun
is_ranged=yes
service=1961–present
used_by=See "Users"
wars=
designer=Miroslav Rybář
design_date=1959
manufacturer=Česká Zbrojovka Uherský Brod, Zastava Arms [http://www.janes.com/extracts/extract/jiw/jiw_0314.html]
production_date=
number=Approx. 210,000
variants=See "Variants"
weight=kg to lb|1.30|sp=us|abbr=on|precision=2|wiki=yes (vz. 61) convert|1.28|kg|abbr=on (vz. 61 E) convert|1.44|kg|abbr=on (vz. 82, vz. 83)
length=mm to in|517|abbr=on|precision=1|wiki=yes stock extended / convert|270|mm|abbr=on|1 stock folded
part_length=convert|115|mm|abbr=on|1 (vz. 61, vz. 61 E) convert|113|mm|abbr=on|1 (vz. 82, vz. 83)
width=convert|43|mm|abbr=on|1 (vz. 61, vz. 61 E) convert|49|mm|abbr=on|1 (vz. 82, vz. 83)
crew=
cartridge=7.65x17mm Browning SR (.32 ACP) (vz. 61, vz. 61 E) 9x18mm Makarov (vz. 82) 9x17mm Short (.380 ACP) (vz. 83)
action=Blowback, closed bolt
rate=850 rounds/min (vz. 61, vz. 61 E) 900 rounds/min (vz. 82, vz. 83)
velocity=convert|320|m/s|0|lk=on|sp=us|abbr=on (vz. 61, vz. 61 E, vz. 82) convert|292|m/s|abbr=on|1 (vz. 83)
range=Sights fixed for 75 and 150 m
max_range=
feed=10 or 20-round curved magazine, straight box magazine in 9 mm variants
sights=Adjustable front post, flip-up rear sight convert|148|mm|abbr=on|1 sight radius

The Škorpion vz. 61 is a Czechoslovakian 7.65 mm submachine gun (often classified as a machine pistol), developed in the 1950s by Miroslav Rybář (1924–1970) and produced under the official designation "Samopal vzor 61" ("submachine gun model 1961") by the Česká Zbrojovka arms factory in Uherský Brod. Although it was developed for use with security forces, the submachine gun was also accepted into service with the Czechoslovak Army, as a personal sidearm for lower-ranking army staff, vehicle drivers, armored vehicle personnel and special forces. Currently the weapon is in use with the armed forces of the Czech Republic, Slovakia, Angola, Croatia, Egypt, Iraq, Libya, Mozambique and Uganda. Production rights to the submachine gun were also acquired by the Yugoslavian Crvena Zastava factory (currently Zastava Arms), which license-built the weapon in the 1980s as the M84. It features a synthetic pistol grip compared to the original version (a civilian, semi-automatic pistol version was also produced, known as the M84A, also available in 9x17mm Short).

Design details

The Škorpion uses the 7.65x17mm Browning SR (.32 ACP) pistol cartridge, which was the standard service cartridge of the Czechoslovak security forces. It is a select-fire, straight blowback-operated weapon that fires from the closed bolt position. The cartridge used produces a very low recoil impulse and this enables simple unlocked blowback operation to be employed; there is no delay mechanism and the cartridge is supported only by the inertia of the bolt and the strength of the return springs. When fired, gas pressure drives the case back in the chamber against the resistance provided by the weight of the bolt and its two recoil springs. The bolt travels back, extracting the empty case which is then ejected straight upwards through a port in the receiver housing top cover. The Škorpion’s compact dimensions were achieved by using a telescopic bolt assembly that wraps around a considerable portion of the barrel. The weapon features a spring-loaded casing extractor, installed inside the bolt head and a fixed, double ejector, which is a protrusion in the weapon’s frame.

As the bolt is relatively light, the Škorpion utilizes an inertial rate reducer device (housed inside the wooden pistol grip) used to lower the weapon's rate of fire from 1,000 rounds/min to a more manageable 850 rounds/min. The rate reducer operates as follows: when the bolt reaches the end of its rearward stroke it strikes, and is caught by a spring-powered hook mounted on the back plate. At the same time it drives a lightweight, spring-loaded plunger down into the pistol grip. The plunger is easily accelerated and passes through a heavy weight which is left behind because of its inertia. The plunger, having compressed its spring, is driven up again and then meets the descending inertia buffer. This slows down the rising plunger which, when it reaches the top of its travel, rotates the hook, releasing the bolt which is driven forward by the compressed recoil springs.

The submachine gun is hammer-fired and has a trigger mechanism with a fire mode selector, whose lever, installed on the left side of the receiver, above the pistol grip, has three settings: “0” – weapon safe, “1” – semi-automatic mode and “20” – fully automatic fire. The “safe” setting disables the trigger mechanism and the bolt in the forward position (by sliding the bolt catch lever upwards). [cite book |title= Assault Pistols, Rifles, and Submachine Guns|last=Long |first=Duncan |authorlink= |coauthors= |year= 1986|publisher= Paladin Press|location= Boulder, Colorado|isbn=0-87364-353-4 |pages= 18|url= ] The Škorpion uses two types of double-column curved box magazines: a short 10-round (loaded weight – 0.15 kg) or a long 20-round capacity magazine (loaded weight – 0.25 kg). The bolt remains locked open when the last cartridge from the magazine has been fired and can be snapped forward by pulling the cocking handle knob slightly to the rear. The Škorpion is equipped with open-type iron sights (mechanically adjustable forward post and flip rear sight with 75 and 150 m range notches) and a folding metal wire shoulder stock, that folds up and over the receiver and is locked on the front sight’s protection capture.

The Škorpion, together with a short magazine, is carried like a traditional pistol – in a leather holster, and the two spare long magazines are carried in a separate pouch. The weapon comes with a cleaning kit, front sight adjustment tool, oil bottle and lanyard. The firearm can also be used with a sound suppressor.

Variants

In the 1960s, three other variants of the vz. 61 were developed in Czechoslovakia: the vz. 64 (chambered for the 9x18mm Makarov pistol cartridge), vz. 65 (designed for use with the 9x17mm Short cartridge) and the vz. 68 (in 9x19mm Parabellum), however production of these variants was never undertaken. In the 1990s Česká Zbrojovka offered the following submachine guns: the vz. 61 E (7.65x17mm Browning SR version with a synthetic plastic pistol grip), vz. 82 (9x18mm Makarov and a longer 113 mm barrel) and vz. 83 (for the 9x17mm Browning Short cartridge). A semi-automatic only variant known as the CZ-91S was developed for the civilian market, available in the aforementioned calibers. The vz. 82, vz. 83 and CZ-91S pistols chambered in 9 mm use straight box magazines.

Users

*flag|Afghanistan
*flag|Angola
*flag|Bosnia and Herzegovina
*flag|Croatia
*flag|Czech Republic [http://www.army.cz/scripts/detail.php?id=5081]
*flag|Czechoslovakia
*flag|Egypt
*flag|Iraq
*flag|Libya
*flag|Montenegro
*flag|Mozambique
*flag|Serbia
*flag|Slovakia
*flag|Uganda
*flag|Yugoslavia

ee also

*OTs-02 Kiparis
*Heckler & Koch MP7

References

External links

* [http://www.czub.cz/index.php?p=32&idp=9&ids=36&idz=227&lang=en Česká Zbrojovka – official page]
* [http://www.czub.cz/navody/cz360_en.pdf Instruction manual]
* [http://world.guns.ru/smg/smg26-e.htm Modern Firearms]
*YouTube|r-aHAh4eOSE|Video of operation ja icon