ASh-12.7

The ASh-12.7 (АШ-12.7, which stands for "Автомат штурмовой 12.7мм" or "Automatic assault rifle, 12.7mm") assault rifle is a dedicated CQB/Urban Operations weapon, developed by TsKIB SOO ("Central Design and Research Bureau of Sporting and Hunting Arms"), a subsidiary of the KBP Instrument Design Bureau of Tula, Russia, by request from the Russian FSB (Federal Security Service). The weapon is intended for special units of the FSB which operate in urban environments against heavily armed and organized gangsters and terrorists. According to the Russian press, the first batch of ASh-12.7 assault rifles was delivered to the FSB in late 2011. The ASh-12.7 is a dedicated "Close/Urban combat" weapon for high-risk law enforcement operations, which must combine high stopping power with limited penetration and a short 'dangerous range', to avoid collateral damage to innocent bystanders or hostages. To achieve these goals, the designers of the ASh-12.7 assault rifle developed special large-caliber ammunition, loaded with a variety of bullets. Ammunition for the ASh-12.7 is based on the 12.7×55mm straight-walled, rimless brass case, originally developed by the same organization for the silenced VKS sniper rifle. Standard loading for the ASh-12.7 is a lightweight, supersonic bullet with an aluminum core, exposed at the front and hollowed at the rear and partially enclosed into a bi-metal jacket. The cartridge has a bullet weight of 48.14-76.08 grams and a muzzle velocity of 290–315 metres per second. It has several loadings; light, heavy and a duplex load with two light bullets.