OTs-01 and OTs-01S Kobalt revolvers 9mm
The 9 mm OTs-01 and OTs-01S Kobalt revolvers are developments of the RSA revolver and have replaced that model in production. The design of the RSA 9 mm revolver has been credited to Igor Stechkin and Boris Avramov, hence Revolver Stechkina-Aramova - RSA. Development of the RSA commenced during 1991 to meet a requirement for a standard service revolver for the Russian Federation Interior Ministry; development was completed during 1992.
The OTs-01 is chambered for the 9 × 18 mm Makarov (57-N-181S) cartridge while the OTs-01S is chambered for 9 x 17 mm Short (0.380 ACP). Rounds are fed into the swing-out cylinder in two clips, each holding three rounds. The rounds are located in the clips so that they load into alternate chambers. The two clips are therefore located with one clip placed over the clip already loaded.
One unusual feature is a safety catch on the left of the revolver. Actuating the safety, locks the external hammer and cylinder rotation. Service life is given as at least 3,000 rounds. Various butt grip configurations are available.
Cartridge: 9 × 18 mm Makarov (57-N-181S) or 9 × 17 mm Short (0.380 ACP)
Operation: double- or single-action revolver
Feed: 6-round cylinder
Weight: empty, 800 g; 3-round clip, 65 g
Length: 200 mm
Height: 130 mm
Width: 40 mm
Barrel: 75 mm
Sights: fore, fixed blade; rear, notch
Muzzle velocity: OTs-01, 300 to 320 m/s
KBP Instrument Design Bureau
Tula 300001, Russia.
Rosoboronexport Federal State Unitary Enterprise
21 Gogolevsky Boulevard, 119865 Moscow.
In service with the Russian Federation Interior Ministry. Offered for export sales.
Type: TKB Kobalt
Remarks: Standard specifications.
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