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The 7.62×39mm (aka 7.62 Soviet, formerly .30 Russian Short) [5] round is a rimless bottlenecked intermediate cartridge of Soviet origin. The cartridge is widely used due to the global proliferation of the AK-47 rifle and related Kalashnikov rifles , the SKS semi automatic rifle, as well as the RPD and RPK light machine guns .
The below table gives a list of firearms that can fire the 7.62×39mm cartridge, first developed and used by the Soviet Union in the late 1940s. [1] The cartridge is widely used due to the worldwide proliferation of Russian SKS and AK-47 pattern rifles, as well as RPD and RPK light machine guns.
The M92 also features a shorter barrel. Unlike most rifle rounds which would otherwise experience a loss of velocity out of a shorter barrel, the 7.62×39mm round loses very little velocity when compared to a full-length barrel. This makes it an excellent round for short-barrel rifles.
The 6.5 Grendel bullets have a true diameter of 6.71mm / 0.264" and the 6.5 Grendel case can be formed from abundant 7.62x39 cases with a neck re-sizing die, and fire-forming a slight change to the shoulder, if the case is made from brass. Many of the popular 7.62x39 cases are made from steel, which will not work for reforming the shoulder.
The "point-blank range" battle zero setting "П" on the 7.62×39mm AKM rear tangent sight element corresponds to a 300 m (328 yd) zero. [7] For the AKM combined with service cartridges the 300 m battle zero setting limits the apparent "bullet rise" within approximately −5 to +31 cm (−2.0 to 12.2 in) relative to the line of sight.
Improvements were made to the initial design from the 1970s which made the rifle capable of handling more powerful cartridges such as the .308 Winchester/7.62×51mm and the more prevalent .223 Remington/5.56×45mm, 5.45×39mm, and 7.62×39mm calibers. These improvements contributed to the modern line of the Saiga rifles being adopted by many ...
The M240L weighs 22.3 lb (10.1 kg) with a standard-length barrel and standard stock, and weighs 21.8 lb (9.9 kg) with a shorter barrel and collapsible stock. The short barrel is 4 in (102 mm) shorter than a standard M240 barrel, and with the collapsible stock the M240L can be made 7 in (178 mm) shorter.
The Type 81 (fixed stock) and Type 81-1 (folding stock) are 7.62×39mm caliber assault rifles with 30-round magazines, and the heavier Type 81 light machine gun (LMG) fitted with a 75-round drum magazine is used in the squad automatic weapon (SAW) role. [11] Its sight remains at the front of the LMG barrel.