OTs-20 Gnom

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The OTs-20 Gnom (ОЦ-20 "Гном") is a Russian revolver manufactured by the KBP Instrument Design Bureau. It uses a proprietary 12.5x40mm STs-110 cartridge developed from a 32 gauge shotgun cartridge. It can fire lead slug (STs-110-04), lead shot (STs-110-02), and armor-piercing steel-core slug (STs-110) cartridges, as well as three types of non-lethal ammunition. The revolver is smooth bore and so it lacks accuracy but has high muzzle velocity and stopping power. A tactical laser projector is available that mounts on an accessory rail under the ejector rod shroud. It is turned on and off via a pressure switch that can be attached on the grip; the operator just squeezes the grip and the projector goes on or off. The manufacturer claims that the steel-core slug can penetrate 4.5 mm of "standard body armor plate" at 25 m. They also claim that the dispersion of this bullet at this distance is about 5 cm.