AK-74 be used by the majority of countries of the former Soviet Union. Additionally, licensed copies were produced in Bulgaria (AK-74, AKS-74 and AKS-74U), and the former East Germany (MPi-AK-74N, MPi-AKS-74N, MPi-AKS-74NK). Besides former Soviet republics and eastern European countries, Mongolia, North Korean Special Forces, and Vietnamese People's Naval infantry use AK-74s. The AK-74 was designed by А. D. Kryakushin's group under the design supervision of Mikhail Kalashnikov and is an adaptation of the 7.62×39mm AKM assault rifle and features several important design improvements. These improvements were primarily the result of converting the rifle to the intermediate-caliber high velocity 5.45×39mm cartridge.
Type 81 assault rifle Chinese Type 56 assault rifle (a license produced AK-47), but it has a SKS-like short-stroke gas-piston design and other improvements to reduce recoil and muzzle jump, giving better firing accuracy. Notable physical differences from the Type 56 assault rifle include the stock of the rifle, the length of the action, bayonet, and the positioning of the front sight. The most easily distinguishable feature of the Type 81 is the more exposed muzzle part of the barrel. The front sight has been moved back as a modification to be able to fire 22mm rifle grenades, which are slid over the unobstructed