The OTs-20 Gnom (ОЦ-20 "Гном")[4] is a Russian revolver manufactured by the KBP Instrument Design Bureau.
[3] The revolver is smooth bore and so it lacks accuracy[5] 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.
The gun was partially derived from the 9 mm OTs-11 Nickel revolver previously developed by Nevizhin and Zotov.
[5] Derived from the 9mm R-92 revolver, the UDAR was designed to be used as a self-defense and riot-control weapon for undercover or plainclothes police.