Project 21630 Buyan is the original Russian Buyan-class river-sea artillery corvette, built by Almaz Shipbuilding for Caspian Flotilla service. The three ships combine a 100 mm gun, 122 mm Grad-M rocket launcher, 3M-47 Gibka launchers for Igla missiles, and AK-630 close-in defenses on a shallow-draft hull designed for coastal operations.
Project 21630 mounts 3M-47 Gibka launchers for Igla short-range surface-to-air missiles.
| Ammunition | Ammunition type | Firing evidence |
|---|---|---|
 | Short-range surface-to-air missile | USNI describes the Project 21630 ships as carrying 3M-47 Gibka launchers for Igla short-range surface-to-air missiles, so the class has a point-defense air-defense layer in addition to its gun and rocket armament. |
The three Project 21630 Buyan ships entered Russian Navy service and were assigned to the Caspian Flotilla, which keeps the class relevant to contemporary conflict reporting even though the open sources consulted here do not isolate a separate named combat episode for the 21630 subtype.
