Jatimatic

From Wikipedia, the free encyclopedia

Jatimatic
Type	Submachine gun
Place of origin	Finland
Production history
Designer	Jali Timarin
Designed	1982-1983
Manufacturer	Tampereen Asepaja Oy
Produced	1983-1986
Number built	Approx. 400
Variants	GG-95 PDW
Specifications
Weight	1.65 kg (3.64 lb)
Length	375 mm (14.8 in)
Barrel length	203 mm (8.0 in)

Cartridge	9x19mm Parabellum
Action	Straight blowback
Rate of fire	600-650 rounds/min
Muzzle velocity	360 m/s (1,181 ft/s)
Effective range	100 m range setting
Feed system	20, 40-round detachable box magazine
Sights	Forward open sight

The Jatimatic is a Finnish 9 mm submachine gun developed in the late 1970s and early 1980s by Jali Timari. The submachine gun made its debut in 1983. The Jatimatic was manufactured in very limited numbers (approx. 400) initially by Tampereen Asepaja Oy of Tampere and later - Oy Golden Gun Ltd (as the GG-95 PDW, re-introduced unsuccessfully in 1995). The firearm was designed primarily for police, security forces and armored vehicle crews. It was never adopted into service by the Finnish Defence Forces, although the later GG-95 PDW version was tested by the FDF in the 1990s; the conclusion of the tests was that the GG-95 was not suitable as a service weapon.

1 Design details
2 Notes
3 References
4 External links

[edit] Design details

The Jatimatic is an automatic, blowback-operated firearm. A unique feature of this design is the angle of the bolt guide rails in relation to the bore axis.^[1] During firing, the telescopic bolt, which encloses the barrel for most of its length, recoils up an inclined plane at an angle to the barrel, giving an element of braking to the bolt, and also resisting the upward movement of the barrel during firing. This arrangement aligns the shooters hand wrapping the pistol grip directly with the longitudinal axis of the barrel.^[1] The pistol grip is also located higher than on many other submachine guns, giving better control over recoil and muzzle rise. The Jatimatic has an extractor contained in the bolt and a fixed ejector installed in the trigger housing. The weapon’s ejection port is covered in both the forward and rear positions of the bolt assembly, securing the gun’s internal mechanisms against dust and debris. The left surface of the bolt is engraved with a visual warning sign labeled “FIRE”, which is visible through the ejection port when the weapon is cocked (the bolt is moved to the rear position).^[1]

The submachine gun uses 20 or 40-round box magazines. The trigger mechanism features a two-stage progressive trigger that provides two modes of operation: semi-automatic fire, when the trigger is squeezed momentarily and fully automatic fire produced when the trigger is pulled all the way through and held back.^[1] No fire control selector is provided. The Jatimatic features a striker firing mechanism with a fixed firing pin installed inside the bolt (the dual-purpose return spring also serves as the firing pin spring). The weapon is chambered for the NATO-standard 9x19mm Parabellum pistol cartridge.

Reloading the weapon involves charging the folding vertical forward grip, which is simultaneously the cocking handle. The grip is deployed and locked forward with a spring latch and then charged to the rear and guided back forward in order to chamber a round. The forward grip does not reciprocate with the bolt during firing and also secures the weapon against unintentional discharge in the stowed (folded) position, immobilizing the bolt in either its forward or rear positions by using a protrusion on the grip to engage and secure a notch in the bolt. This allows the weapon to be carried safely loaded or unloaded and provides a drop safety feature.^[1]^[2]

The Jatimatic has an open iron sight fixed for 100 m. The receiver is made from stamped sheet steel with a hinged cover.

The Jatimatic lacks a folding stock common for this class of firearm; the weapon is instead fired unsupported from the hip or raised arm, without resting the firearm on the shooter’s shoulder.^[1]

[edit] Notes

^ ^a ^b ^c ^d ^e ^f Woźniak, Ryszard. Encyklopedia najnowszej broni palnej - tom 2 G-Ł. Bellona. 2001. pp133-134.
^ http://www.google.com/patents?id=Wd07AAAAEBAJ&dq=4555973