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Slow Mo Of AK74N Firing (How It Works AK74N Assault Rifle)
Locked and loaded: Kalashnikov releases updated RPK-16 light machine gun
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 assault rifle. The 5.45×39mm gradually supplemented, then largely replaced the 7.62×39mm cartridge in Soviet and Warsaw Pact service as their primary military service rifle cartridge.