The Pr.123-bis is a production variant of the Project 123 Komsomolet-class Torpedo Boat used by the Soviet Navy during World War II. Development of Project 123 originally began in 1939, but the urgent need to replace the previous model due to the unsatisfactory performance of the G-5 motor torpedo boat arose in 1942. In 1943, the navy approved the production model of the project, resulting in the designation Project 123-bis. It was equipped with two twin 12.7 mm DShK heavy machine guns and utilized two American-supplied Packard petrol engines acquired through the Lend-Lease program.

This boat was introduced during Update 1.79 "Project X" when the Soviet fleet was implemented into the game. Its gameplay is similar to many other MTBs in the game, but its superior speed allows it to swiftly capture strategic points and eliminate enemy boats attempting to reach your capture point thanks to its armament who consist of two twin 12.7 mm DShK heavy machine guns. As a torpedo boat, it also carries two 45-36NU torpedoes, useful for targeting slow-moving vessels or lower-ranked destroyers or frigates. Additionally, it can carry BM-1 small depth charges, although their explosive power is insufficient to destroy enemy destroyers or frigates outright, they can still damage or destroy enemy boats with one or two depth charges.