Group : Patrol Boats
Status : Active
Also Known As : Astrakhan (lead ship), Buyan (Russian name), Project 21632 (export version), Tornado (export class name)
Origin : Russia
Contractors : Almaz Shipbuilding, Zelenodolsk Design Bureau
Initial Operational Capability (IOC) : 2008
Total Production : 3

The Project 21630 vessels are equipped with radar and hull-mounted sonar. Their weapon system consists of a single A-190 100mm cannon and two AK-306 30mm anti-aircraft guns. The A-215 Grad-M artillery system with 40 122mm rockets is intended to provide fire support against positions onshore. Besides, these vessels are equipped with a variety of 14.5mm (2) and 7.62mm (3) machine guns. So far, the Russian Navy has commissioned three Project 21630 gunboats. The lead vessel Astrakhan entered active duty in 2008. The Buyan-class vessels were commissioned by the Russian Navy in the Caspian Sea to protect Russian borders.

Group : Missile Boats
Status : Active
Also Known As : Buyan-M, Grad Sviyazhsk (lead ship)
Origin : Russia
Contractors : Almaz Shipbuilding, Zelenodolsk Design Bureau
Initial Operational Capability (IOC) : January 2014
Total Production : 12
Unitary Cost : USD $70 million

The 900-ton class Project 21631 Buyan-M is an stretched version of the 500-ton Buyan class gunboat. The Buyan-M features a larger and more sophisticated weapons payload including state-of-the-art missile systems. The 74-meter long ship is intended to perform anti-surface warfare (ASuW) combat missions with secondary air defense capability thanks to four Igla-1M surface-to-air missiles (SAM). The Buyan-M weapon system consists of a single A-190 100mm cannon, two AK-630M anti-aircraft guns, eight Club-S Kalibr anti-ship missiles, and four Igla-1M SAMs mounted on a 3M47 Gibka launcher. Besides, these vessels are equipped with a variety of 14.5mm (2) and 7.62mm (3) machine guns. The Russian Navy plans to procure three ships to be based in the Caspian Sea beginning in 2012 or 2013. The Russian Navy increased the number of Buyan-M gunboats to nine in late 2013/early 2014 with three boats to be delivered to the Black Sea and Baltic fleets.

Group : Missile Boats
Status : Cancelled
Also Known As : Sarsar
Origin : Russia
Initial Operational Capability (IOC) : 2018
Total Production : ?

The Project 21635, also known as Sarsar, is a small missile ship derived from the Buyan class gunboats. The new vessel was introduced by Rosoboronexport at the Army-2018 exhibition on August 21, 2018.