NSV-12
In 1972 a machine gun developed by G.I. Nikilin, Yu.M. Sokolovand V.I. Volkovwas adopted for service to replace the 12.7mm DShKM machine gun and it was designated NSV-12.7 (Nikitin-Sokolov-Volkov, 12.7 mm, code name -Utes>, Index 6P11).
The machine gun Is a gas-operated weapon with a long travel of its piston and a gas-regula¬tor. In an effort to make the fully automated parts more smooth operated the bolt carrier was provided with the guide rollers and the return mechanism with a piston buffer spring. The barrel is of a removable type. The locking of the barrel is ensured via the skew of the bolt to the left. The firing mechanism is assembled in a separate housing and ensures only auto¬matic mode of fire actuated whether by an elec¬tric or manual triggers. The shot is fired from the rear sear. The safety thumb locks the sear.
The weapon is fed from a metallic cartridge-belt either from the right side or from the left side. The refuse from the versatile mount made the NSV-S-12.7 mounted version more manoeu¬vrable. The 6T7 tripod mount developed by L.V. Stepanov and K.A. Barishev is intended to defeat ground targets, it is provided with the stock of its own, control grip, firing mechanism and the sight bracket intended to mount the SPP optical sight, NSPU-3 (1PN51) night sight or NSPU-5 (1PN83).
The 6U6 mount developed under the guid¬ance of R.Ja. Purtsen with the OP80 collimating sight is intended for the AD fire.
The NSV-12.7 is noted for its relatively light weight, easy of operation at laying, a low disper¬sion shot pattern and possibility to fire from prone position. There were also the 6U10 and 6U11 mounts to install this machine gun in
permanent fighting pillboxes.
The NSV machine gun is also used in the AD role mounted on tanks (NSV-T), combatant ships, and armament of DOS.
The production of the NSV-S-12.7 was launched at the «Metallist» Plant situated in the city of Uralsk and the «Molot» Plant in the city of Vyatskie Polyany where its mounts were being produced.
Specifications
Caliber ………………………………12.7mm
Cartridge…………………………12.7×107 DShK
Weapon weight w/o ammo load………………….25 kg
Weapon weight w/cartridge belt on 6T7 mount ………..41 kg
Weapon weight w/cartridge belt
on universal mount 6U6……………………92.5 kg
Weapon length………………………… 1.560 mm
Weapon length on mount 6T7 ……………….. 1.900 mm
Weapon height on mount 6T7 …………………380 mm
Muzzle velocity…………………………845 m/sec
Rate of tire ………………………700-800 rds/min
Etlectrve rate ot lire ………………….80-IOOrrJs/min
Sighting range …………………………. 2.000 m
Thickness ol a penetrated armor plate
at a range ol 500 m……………………… 16 mm
Cartridge belt capacity ………………………50rds
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