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A 5.56 NATO round fired from a 20 in (510 mm) barrel has a flatter trajectory than a 7.62 NATO round fired from a barrel of equal length, while the 5.56 NATO fired from a 14.5 in (370 mm) barrel has the same trajectory as the 7.62 NATO from a 20 in barrel, as well as the same time of flight.
The 7.62×39mm (also called 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-pattern rifles , the SKS semi-automatic rifle, and the RPD / RPK light machine guns.
The ULMG is fitted with the same barrel as the NG-7 SF, a 420 mm (16.5 in) long barrel that is shorter than NG-7, and it is 1.4 kg lighter than the NG-7. [24] The ULMG can be converted to 6.5mm Creedmoor by changing barrels. Negev 7 ULMG SF – a compact variant of the Negev 7 ULMG, fitted with a 330 mm (13.0 in) long barrel. [25]
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.
Building on the success of their G3 design, the company developed a family of small arms (all using the G3 operating principle and basic design concept) consisting of four types of firearms: the first type, chambered in 7.62×51mm NATO; the second, using the Soviet 7.62×39mm M43 round; the third, chambered in .223 Remington and 5.56×45mm NATO ...
7.62×39mm 5.56×45mm NATO (Israeli conversion) Action: Gas operated long stroke piston, flapper locking and fires from the open bolt: Rate of fire: 650 rounds/min: Muzzle velocity: 735 m/s (2,411 ft/s) Effective firing range: 100–1,000 m sight adjustments: Feed system: Non-disintegrating 100-round segmented belt stored in a drum container.
5.56×45mm NATO 7.62×39mm 7.62×51mm NATO China: yes 2016-present CZ 805 BREN/ CZ 805 BREN 2: Česká zbrojovka Uherský Brod: 5.56×45mm NATO 7.62×39mm Czech Republic: 2009–present (BREN) 2015–present (BREN 2) CZ 807: Česká zbrojovka Uherský Brod: 7.62x39mm 5.56×45mm NATO Czech Republic: 2013 ČZ 2000: Česká zbrojovka Uherský Brod ...
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.