(Commission Internationale Permanente pour l'Epreuve des Armes à Feu Portatives) rulings the 5.45×39mm can handle up to 355.00 MPa (51,488 psi) P max piezo pressure. The common rifling twist rate for this cartridge is 255 mm (1 in 10 inches), 4 grooves, Ø lands = 5.40 mm, Ø grooves = 5.60 mm, land width = 2.60 mm and the primer type is either berdan or small rifle. Īmericans would define the shoulder angle at α⁄ 2 ≈ 20.3°. Cartridge dimensions ĢO) cartridge case capacity. In the former Soviet Union this ammunition is produced in Russia, Kyrgyzstan, Uzbekistan and Ukraine. Military 5.45×39mm ammunition was produced in the former Soviet Union, GDR and Yugoslavia, and is produced in Bulgaria, Poland and Romania.
Steel assault rounds free#
Tests indicate the free recoil energy delivered by the 5.45×39mm AK-74 assault rifle is 3.39 J (2.50 ft⋅lb), compared to 6.44 J (4.75 ft⋅lb) delivered by the 5.56×45mm NATO in the M16 assault rifle and 7.19 J (5.30 ft⋅lb) delivered by the 7.62×39mm in the AKM assault rifle. The propellant charge is a ball powder with similar burning characteristics to the WC844 powder used in 5.56×45mm NATO ammunition. The primer has a copper cup and is sealed with a heavy red lacquer. Its 39.37 mm (1.55 in) length makes it slightly longer than the 7.62×39mm case which measures exactly 38.60 mm (1.52 in). The brown- lacquered steel case is Berdan primed.
![steel assault rounds steel assault rounds](https://i.pinimg.com/originals/19/b6/47/19b647a3f303621441885dc0fe4d8355.jpg)
The lead plug, in combination with the air space at the point of the bullet, has the effect of moving the bullet's center of gravity to the rear the hollow air space also makes the bullet's point prone to deformation when the bullet strikes anything solid, inducing yaw. The 7N6 uses a boat-tail design to reduce drag and there is a small lead plug crimped in place in the base of the bullet. The bullet is cut to length during the manufacturing process to give the correct weight. The unhardened 1.43 g (22.1 gr) steel (steel 10) rod penetrator core is covered by a thin lead inlay which does not fill the entire point end, leaving a hollow cavity inside the nose. The 3.43 g (52.9 gr) 25.55 mm (1.01 in) long boat-tail projectile's jacket is clad in gilding metal.
Steel assault rounds full#
The Soviet original military issue 7N6 cartridge variant introduced in 1974 is loaded with full metal jacket bullets that have a somewhat complex construction.
![steel assault rounds steel assault rounds](https://www.gamesatlas.com/images/cod-black-ops-cold-war/weapons/ffar-1-2.jpg)
Cartridges like the 5.45×39mm, 5.56×45mm NATO and Chinese 5.8×42mm allow a soldier to carry more ammunition for the same weight compared to their larger and heavier predecessor cartridges, have favourable maximum point-blank range or "battle zero" characteristics and produce relatively low bolt thrust and free recoil impulse, favouring lightweight arms design and automatic fire accuracy. The 5.45×39mm is an example of an international tendency towards relatively small-sized, lightweight, high-velocity military service cartridges. The 5.45×39mm couples a sensible case volume (1.75 ml) to bore area (23.99 mm 2/0.2399 cm 2) ratio with ample space for loading relatively long slender projectiles that can provide good aerodynamic efficiency and external ballistic performance for the projectile diameter. The 5.45×39mm cartridge was developed in the early 1970s by a group of Soviet designers and engineers under the direction of M.
![steel assault rounds steel assault rounds](https://cdn.shopify.com/s/files/1/1482/5484/products/ac_20-_20293_ak-47_20assault_20rifle_56d0ed8b-6100-4df9-9fc1-6b5789d076fd_grande.jpg)
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. It was introduced into service in 1974 by the Soviet Union for use with the new AK-74. The 5.45×39mm cartridge is a rimless bottlenecked intermediate cartridge. Soviet Union/ Russian Federation, former Soviet republics, former Warsaw PactĪfghan War, Georgian Civil War, First Chechen War, Second Chechen War, Yugoslav Wars, War in Afghanistan (2001–present), Syrian Civil War, 2020 Nagorno-Karabakh conflict, 2022 Russian invasion of Ukraineģ.43 g (53 gr) 7N6M FMJ hardened steel coreģ.62 g (56 gr) 7N10 FMJ enhanced penetrationģ.69 g (57 gr) 7N22 AP hardened steel coreĥ.2 g (80 gr) 7U1 subsonic for silenced AKS-74UB