![]() Required performance was to pierce a helmet at 400 meters. Her requirements were to develop a cartridge dimensionally identical to the standard 5.45x39mm cartridge but with a muzzle velocity not over 984 fps. Neugodov was charged with the design of a silencer. Bulavskaya, was appointed to lead the ammunition project. The designer of the 5.45x39mm 7N6 cartridge, Lidya I. In 1968 the development of a special 5.45x39mm cartridge with subsonic muzzle velocity for noise-and-flameless application was launched by the Central Scientific and Research Institute for Precision Industry. Notes: AKM assault rifles equipped with the PBS system were replaced by the “Vintorez” (“Screwcutter”) sniper rifle after its adoption in the inventory.Bullet identification markings: Black bullet tip with green belt.The PBS silencer and 7.62x39mm subsonic 57-N-231U cartridge system for the AKM assault rifle was adopted by the Soviets in 1959 and saw heavy use in Afghanistan.Ĭartridge Specifications: 7.62x39mm subsonic 57-N-231U Starting in 1993 the bullet has been produced with the core made of soft low-carbon steel, the same as the 5.45x39mm bullet for the 7N6 cartridge. Large-scale production of this cartridge was launched in 1962 at the Klimovskiy Forging Factory. In 1959 the PBS silencer and 7.62x39mm subsonic 57-N-231U cartridge system for the AKM assault rifle was adopted by the Soviet Army. A dual core design, it featured a high-carbon tool steel penetrator in the nose sitting on top of a lead base. In 1955-1956 the “PBS + cartridge” system was tested leading to a refinement in the bullet design to enable it to pierce a helmet or two steel body armor vest plates out to 400 meters. These early crude subsonic 7.62x54mmR cartridges laid the foundation for the development of much more sophisticated subsonic military cartridges in the years that followed. Issued to commando troops, reconnaissance teams and guerrilla forces, these early silencers provided the Soviet Army with important practical experience. Tens of thousands of Bramit silencers were fielded during the Great Patriotic War (World War II). Identified by a green color coding on the bullet tip and cartridge base, it had a velocity of 853 fps to eliminate the sonic crack. In 1940 a silencer designed by the Mitin brothers for the Soviet Model 1891/30 7.62x54mmR rifle passed military testing and was adopted.ĭubbed “Bramit” (for Mitin brothers) it was issued with a special subsonic 7.62x54mmR cartridge. Their idea was to lock the powder gases within a limited space and it was later developed into the famous captured piston cartridges. In 1931 two amateur designers known as the Mitin brothers, Ivan and Vasily, were granted USSR patent No. It wasn’t long after that work began in the Soviet Union to create a noiseless weapon. In 1908 the first silencer was patented by Hiram Percy Maxim (the son of the famous machine-gun designer).
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