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The sole variant of the JW-103 is the Norinco JW-105 'Bush Ranger' rifle which is chambered for the .223 Remington cartridge. The JW-105 rifle is slightly longer and heavier than the JW-103. The JW-105 also has a front sight but is otherwise identical to the JW-103, but the JW-105 has a higher muzzle velocity than the JW-103.
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 barrel has four right-hand grooves with a rifling twist rate of 185 mm (1:7 in), and has a muzzle velocity of 920 m/s (3,018 ft/s) using standard ammunition. Small numbers of this variant were made in order to show to clients for potential contracts that call for the purchase of the RK 95 TP in 5.56 NATO caliber in trade shows and arms ...
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.
OTs-14-1A-04 7,62/40 – Grenade Launcher variant with a long barrel and a GP-30 under-barrel grenade launcher. OTs-14-2A – Experimental model chambered in 5.45×39mm M74 Soviet. Not adopted due to redundancy caused by preference for the better ballistic performance of the 7.62×39mm round when fired through a short barrel.
The AK-104 is a 314mm (12.4 in) barreled carbine in the AK-100 series of rifles, the dimensions of the gun is the same to other carbines of the AK-100 series. However, the AK-104 also features a solid, side-folding polymer stock, unlike the shorter, skeleton-stocked AKS-74U.
The current issue steel-reinforced matte true black nonreflective surface finished 7.62×39mm 30-round magazines, fabricated from ABS plastic weigh 0.25 kg (0.55 lb) empty. [7] Early steel AK-47 magazines are 9.75 in (248 mm) long, and the later ribbed steel AKM and newer plastic 7.62×39mm magazines are about 1 in (25 mm) shorter.
They can be chambered in 5.45×39mm, 5.56×45mm NATO and 7.62×39mm, and use a barrel and gas system assembly similar to that of the AK-74M/AK-100 rifle family. Improvements added from the AK-12 include Picatinny rails , a new pistol grip, a new adjustable buttstock and a new flash hider. [ 67 ]