The Soviet designation for the Mod Kashin is Project 61MP.

The main addition to the selected ships were four SS-N-2C anti-ship missile launchers.

A pair of AK-630 30mm gatling guns were installed on the sides of the ship, along with a Bass Tilt fire control radar warranting the removal of two RBU-1000 rocket launchers.

The landing pad mounted on the stern of the normal Kashin classes were replaced with a helicopter platform.

The last change made to the Kashins was an increased forward superstructure on two decks.