Users
Russia - prison guards,[6] security guards of Ministry of Agriculture of the Russian Federation[7] and law enforcement[8]
Kazakhstan - since 2005[9] adopted as service firearm for custom service[10][11]
| OC-01 Kobalt | |
|---|---|
| Type | Revolver |
| Place of origin | Russia |
| Service history | |
| In service | 1992–present |
| Used by | Russia |
| Production history | |
| Designer | Igor Stechkin, Boris Avraamov |
| Designed | 1991-1992 |
| Manufacturer | KBP Instrument Design Bureau |
| Produced | 1992 - |
| Variants | See Variants |
| Specifications | |
| Mass | 790 g (28 oz) (small wooden grips)[1] 820 g (29 oz) (large plastic grips)[1] |
| Length | 200 mm (7.9 in)[1] |
| Barrel length | 75[1][2] |
| Width | 37 mm (1.5 in)[1] |
| Height | 136 mm (5.4 in)[1] |
| Cartridge | 9×18mm Makarov (OTs-01)[1] 9x17 mm Short (OTs-01S)[1] |
| Caliber | 9x18mm 9x17mm |
| Action | Double action |
| Effective firing range | 25[1] |
| Maximum firing range | 50[1] |
| Feed system | 6-round cylinder[1] |
| Sights | Fixed; front blade and rear notch |
The OC-01 Kobalt (Russian: ОЦ-01 "Кобальт", "Cobalt") is a Russian double-action 9 mm revolver designed by Igor Stechkin and Boris Avraamov.[2]
The revolver was developed by CKIB SOO from 1991 to 1992 and was meant for sale to the Ministry of Internal Affairs and to law enforcement. In 1992 it was adopted by Ministry of the Interior of the Russian Federation as service weapon under designation RSA (Revolver Stechkina-Avraamova).[2] Since 1994 it was also manufactured by "Zlatoust Machine-Building Plant" and "Uralsk Machine-Building Plant" under designation TKB-0216 (ТКБ-0216).[2]
The revolver resembles a Smith & Wesson "J"-frame revolver, with its small frame, "bird's head" grip and an external hammer. There is a safety on the left-hand side of the grip[3] that locks the cylinder and hammer to prevent it from accidental discharge.
Since it fires rimless cartridges, the six-shot revolver is cut for "moon clips", sheet-metal holders that grasp the rounds by the base to allow them to be extracted easily.
The revolver uses a special Y-shaped "moon clip" that loads alternate chambers and locks into the other "moon clip".[3] This allows alternating types of ammunition (like hollow point or armor-piercing) to be loaded into the same cylinder and allows the user to reload a special type of ammunition and keep the other type in reserve. It can also be used without the "moon clips", but the spent cases would not be extractable unless pushed out from the front of the cylinder with a rod-like object, like a pen or pencil.
Russia - prison guards,[6] security guards of Ministry of Agriculture of the Russian Federation[7] and law enforcement[8] Kazakhstan - since 2005[9] adopted as service firearm for custom service[10][11]