Wednesday, June 1, 2011

dragunov

dragunov

                                      

Caliber:Russian 7.62x54mm Rimmed
Operation:gas, semi-automatic
Capacity:10 round detachable box magazine
Weight:9.5lb (4.31kg) empty with telescope
Length:48.2 in (122.5 cm)
Barrel Length:24 in (62 cm)
Rifling:4 grooves, 1:10 right hand twist
Max Rate of Fire:30 RPM
Aimed Rate of Fire:3-5 RPM
Scope Type:PSO-1 with IR detection capability
Scope Data:24mm objective lens, 4x, 6 degree field of view
Exit Pupil Measurement:6mm
Compatible Passive Night Scopes:NSP-3: 2.7x, 7 degree field of view
range of approx 300 yds
PGN-1: 3.4x, 5.7 degree field of view
range of 400-500 yds






TypeSniper rifledesignated marksman rifle
Place of origin Soviet Union
Service history
In service1963–present
Used bySee Users
WarsVietnam War,[1] Cambodian–Vietnamese WarSoviet war in AfghanistanIraq WarYugoslav WarsFirst and Second Chechen Wars2008 South Ossetia War
Production history
DesignerYevgeny Dragunov
Designed1958–1963
ManufacturerIzhmashOrdnance Factories OrganisationNorinco
Produced1963–present[2]
VariantsSee Variants
Specifications
Weight4.30 kg (9.48 lb) (with scope and unloaded magazine)[2]
4.68 kg (10.3 lb) (SVDS)
4.40 kg (9.7 lb) (SVU)
5.02 kg (11.1 lb) (SWD-M)
Length1,225 mm (48.2 in) (SVD)[2]
1,135 mm (44.7 in) stock extended / 815 mm (32.1 in) stock folded (SVDS)
900 mm (35.4 in) (SVU)
1,125 mm (44.3 in) (SWD-M)
Barrel length610 mm (24.0 in) (SVD, SWD-M)[2]
565 mm (22.2 in) (SVDS)
600 mm (23.6 in) (SVU)

Cartridge7.62x54mmR[2]
ActionGas-operatedrotating bolt
Muzzle velocity830 m/s (2,723 ft/s) (SVD, SVDS, SWD-M)
800 m/s (2,624.7 ft/s) (SVU)
Effective range800 m
Maximum range1,300 m with scope
1,200 m with iron sights
Feed system10-round detachable boxmagazine[2]
SightsPSO-1 telescopic sight and iron sights with an adjustable rear notch sight

The weapon is fed from a curved box magazine with a 10-round capacity and the cartridges are double-stacked in a checker pattern.
The Dragunov's barrel is ended with a slotted flash suppressor. The barrel’s bore is chrome-lined[3] for increased corrosion resistance, and has 4 right-hand grooves with a 320 mm (1:12.6 in) twist rate. The rifled part of the barrel is 547 mm (21.5 in). Later the twist rate was tightened to 240 mm (1:9.4 in) which slightly reduces the accuracy of fire with sniper cartridges and reduces the muzzle velocity to 810 m/s (2,657.5 ft/s). This was done in order to facilitate the use of tracer and armor-piercing incendiary ammunition. These special bullet types required a shorter twist rate for adequate stabilization.[4]
For precision shooting, specifically designed sniper cartridges are used, developed by V. M. Sabelnikov, P. P. Sazonov and V. M. Dvorianinov. The proprietary 7N1 load has a steel jacketed projectile with an air pocket, a steel core and a lead knocker in the base for maximum terminal effect. The 7N1 was replaced in 1999 by the 7N14 round. The 7N14 is a new load developed for the SVD. It consists of a 151 grain projectile which travels at the same 830 m/s, but it has a sharp hardened steel core projectile. The rifle can also fire standard7.62x54mmR ammunition with either conventional, tracer or armor piercing incendiary rounds.
The Russian military has established accuracy standards the SVD and its corresponding sniper grade ammunition have to meet. Manufacturers must perform firing tests to check if the rifles and sniper grade ammunition fulfill these standards. To comply to the standards the SVD rifle with 7N1 sniper cartridges may not produce more than 1.24 MOA extreme vertical spread with 240 mm twist rate barrels and no more than 1.04 MOA extreme vertical spread with 320 mm twist rate barrels. When using standard grade 57-N-323S cartridges the accuracy of the SVD is reduced to 2.21 MOA extreme vertical spread. The extreme vertical spreads for the SVD are established by shooting 5-shot groups at 300 m range. The accuracy requirements demanded of the SVD with sniper grade ammunition are similar to the American M24 Sniper Weapon System with M118SB cartridges (1.18 MOA extreme vertical spread) and the M110 Semi-Automatic Sniper System with M118LR ammunition (1.27 MOA extreme vertical spread).[5]
The Dragunov has a vented, two-piece wooden handguard/gas tube cover and a skeletonized wooden thumbhole stock equipped with a detachable cheek rest; the latter is removed when using iron sights. Newer production models feature synthetic furniture made of a blackpolymer - the handguard and gas tube cover are more or less identical in appearance, while the thumbhole stock is of a different shape.

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