Quick Tip: 5.45x39mm & 5.56x45mm NATO - What's the Diff?
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5.45x39 "Poison Bullet"
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5.45x39 Ammo: The Forgotten Caliber History of 5.45x39mm Ammo Explained
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5.45x39 7N6 Ballistics Gel Test With A SBR'd Krink (HD)
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Does The AK-74 Really Fire A "Poison Bullet"? 5.45x39mm 7n6 Gel Test (Stunning High-Speed)
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.