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Thursday, 14 March 2013

Dragunov sniper rifle

The Dragunov sniper rifle (formally Russian: Снайперская винтовка Драгунова, Snayperskaya Vintovka Dragunova (SVD), literally "Dragunov's sniper rifle") is a semi-automatic sniper rifldesignated marksman rifle chambered in 7.62×54mmR and developed in the Soviet Union.
The Dragunov was designed as a squad support weapon, since according to Soviet and Soviet-derived military doctrines the long-range engagement ability was lost to ordinary troops when submachine guns and assault rifles (which are optimized for close-range and medium-range, rapid-fire combat) were adopted. For that reason it was originally named "Полуавтоматическая винтовка Драгунова" Dragunov's Semi-automatic Rifle.
It was selected as the winner of a contest that included three competing designs: by Sergei Simonov, by Aleksandr Konstantinov and by Yevgeny Dragunov. Extensive field testing of the rifles conducted in a wide range of environmental conditions resulted in Dragunov’s proposal being accepted into service in 1963. An initial pre-production batch consisting of 200 rifles was assembled for evaluation purposes, and from 1964 serial production was carried out by Izhmash.
Since then, the Dragunov has become the standard squad support weapon of several countries, including those of the former Warsaw Pact. Licensed production of the rifle was established in China (Type 79 and Type 85) and Iran (as a direct copy of the Chinese Type 79).

Design details

The Dragunov is a semi-automatic gas-operated rifle with a short-stroke gas-piston system. The barrel breech is locked through a rotating bolt (left rotation) and uses three locking lugs to engage corresponding locking recesses in the barrel extension. The rifle has a manual, two-position gas regulator.
After discharging the last cartridge from the magazine, the bolt carrier and bolt are held back on a bolt catch that is released by pulling the cocking handle to the rear. The rifle has a hammer-type striking mechanism and a manual lever safety selector. The firing pin is a "free-floating" type, and as a result, some soft-primered ammunition had the reputation of causing a "slam fire" event. Thus, military grade ammunition with primers confirmed to be properly seated is recommended for the Dragunov and its variants. This appears to have solved the "slam fire" issue. The rifle's receiver is machined to provide additional accuracy and torsional strength. The Dragunov's receiver bears a number of similarities to the AK action, such as the large dust cover, iron sights and lever safety selector, but these similarities are primarily cosmetic in nature.

Accessories

A number of accessories are provided with the rifle, including a blade-type bayonet (AKM clipped point or the AK-74 spear point bayonet), four spare magazines, a leather or nylon sling, magazine pouch, cleaning kit and an accessory/maintenance kit for the telescopic sight. Also included is a cold weather battery case with a "shirt clip", with a permanently attached cord [approximately 24" long] ending with another battery case cap that has an extension to press against the internal contact in lieu of the battery to complete the circuit. Placement of the external battery case into the shooters' clothing close to the body keeps it from freezing, using the clip ensures it remains in place. The clamp-style BIPOD attaches to machined-out reliefs near the front of the receiver, it literally grabs the two cut out areas and securely mounts with a large round sized head on the clamp bolt able to tightly attach the bipod. The legs are individually adjustable [as opposed to fixed length found on many rifles and LMG's] and can be folded and stowed in a forward position negating the need to remove the bipod before placing the rifle into the canvas carrying case. Interestingly enough, the two legs are held close together with a "J" shaped clamp attached to one leg and swung over the other leg. Original Soviet/Russian SVD bipods fetch a very high price when they rarely appear on the market.


Specifications
Weight 4.30 kg (9.48 lb) (with scope and unloaded magazine)
4.68 kg (10.3 lb) (SVDS)
4.40 kg (9.7 lb) (SVU)
5.02 kg (11.1 lb) (SWD-M)
Length 1,225 mm (48.2 in) (SVD
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 length 620 mm (24.4 in) (SVD, SWD-M) 565 mm (22.2 in) (SVDS)
600 mm (23.6 in) (SVU)

Cartridge 7.62×54mmR
Action Gas-operated, rotating bolt
Muzzle velocity 830 m/s (2,723 ft/s) (SVD)
810 m/s (2,657.5 ft/s) (SVDS)
800 m/s (2,624.7 ft/s) (SVU)
Effective range 800 m
Maximum range 1,300 m with scope
1,200 m with iron sights
Feed system 10-round detachable box magazine
Sights PSO-1 telescopic sight and iron sights with an adjustable rear notch sight





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