The AK-74: How a Soviet design shift redefined the modern infantry assault rifle

Wars & Conflicts · Published 15 October 2026 Swipe more like this →

In short: Designed in 1974, the AK-74 marked a pivotal transition in Soviet small arms by moving from the heavy 7.62mm cartridge to a high-velocity 5.45mm round. This change improved accuracy and range while allowing soldiers to carry more ammunition, fundamentally altering the ergonomics and tactical capabilities of the infantryman's primary weapon.

The AK-74 was developed under the supervision of Mikhail Kalashnikov, with design work led by A. D. Kryakushin’s group. It was conceived as a successor to the AKM, sharing approximately 50% of its parts. The primary driver for this evolution was the adoption of the 5.45×39mm cartridge. This smaller, lighter projectile offered a flatter trajectory and reduced recoil, with tests measuring free recoil energy at 3.39 J, significantly lower than the 7.19 J produced by the 7.62mm AKM. These ballistic advantages allowed for greater accuracy and enabled soldiers to carry more rounds without exceeding the standard 10.12 kg load limit.

Operationally, the rifle functions through a long-stroke gas piston system. Unlike its predecessor, the AK-74 features a chrome-lined bore and a sophisticated muzzle brake designed to counteract muzzle climb and lateral shift. While early Western observers speculated that the 5.45mm bullet was designed to tumble in flesh to increase lethality, studies by Martin Fackler using ballistic gelatin indicated that the projectile behaves like standard full-metal-cased ammunition. It does not fragment, and its wounding potential is consistent with other non-fragmenting military rounds of the era, relying on yaw and cavitation rather than specialized deformation.

The platform proved highly adaptable, leading to variants like the side-folding AKS-74 and the shortened AKS-74U, the latter designed to bridge the gap between submachine guns and rifles. By 1991, the modernized AK-74M was introduced, incorporating glass-filled polyamide furniture and a side-folding stock as standard. This version streamlined production through cost-saving measures like dimple-pressed barrel hardware and simplified optics mounts. As of 2026, the AK-74 remains in widespread use across the former Soviet Union, serving as a testament to the enduring, modular nature of the Kalashnikov design philosophy.

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