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  2. Bulletproof vest - Wikipedia

    en.wikipedia.org/wiki/Bulletproof_vest

    Many common bullets, such as the 7.62×39mm M43 standard cartridge for the AK-47/AKM rifle, [49] have a steel core with hardness rating ranging from Rc35 mild steel up to Rc45 medium hard steel. However, there is a caveat to this rule: with regards to penetration, the hardness of a bullet's core is significantly less important than the ...

  3. AK-47 - Wikipedia

    en.wikipedia.org/wiki/AK-47

    The AK-47 was designed to be a simple, reliable fully automatic rifle that could be manufactured quickly and cheaply, using mass production methods that were state of the art in the Soviet Union during the late 1940s. [41] The AK-47 uses a long-stroke gas system generally associated with high reliability in adverse conditions.

  4. Case-hardening - Wikipedia

    en.wikipedia.org/wiki/Case-hardening

    Case-hardening or carburization is the process of introducing carbon to the surface of a low-carbon iron, or more commonly a low-carbon steel object, in order to harden the surface. Iron which has a carbon content greater than ~0.02% is known as steel .

  5. 7.62×39mm - Wikipedia

    en.wikipedia.org/wiki/7.62×39mm

    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.

  6. 7.62×54mmR - Wikipedia

    en.wikipedia.org/wiki/7.62×54mmR

    The 7.62×54mmR has a 4.16 mL (64 gr H 2 O) cartridge case capacity. The exterior shape of the case was designed to promote reliable case feeding and extraction in bolt-action rifles and machine guns alike, under challenging conditions. 7.62×54mmR maximum C.I.P. cartridge dimensions. All sizes in millimeters (mm). [5]

  7. Kalashnikov rifle - Wikipedia

    en.wikipedia.org/wiki/Kalashnikov_rifle

    Kalashnikov rifles (Russian: Автоматы Калашникова), also known as the AK platform, AK rifles or simply the AK, are a family of assault rifles based on Mikhail Kalashnikov's original design.

  8. 5.45×39mm - Wikipedia

    en.wikipedia.org/wiki/5.45×39mm

    The 5.45×39mm cartridge is a rimless bottlenecked intermediate cartridge.It was introduced into service in 1974 by the Soviet Union for use with the new AK-74.The 5.45×39mm gradually supplemented and then largely replaced the 7.62×39mm cartridge in Soviet and Warsaw Pact service as the primary military service rifle cartridge.

  9. Type 56 assault rifle - Wikipedia

    en.wikipedia.org/wiki/Type_56_assault_rifle

    The barrel on the Type 56 is similar to the AK-47 and heavier than that of the AKM though is pinned in like the AKM and unlike the AK-47. Military issued versions of the Type 56 also lack the threaded muzzle found on the AK-47 and AKM, this means they cannot use an AKM compensator or blank-firing device .