In 1953-1954, there was multiple programs involving modifying the MiG-15bis into various other roles and specialities. One such variant was the MiG-15bis-ISH, a dedicated "Shturmovik", or ground attacker. For the ground attack modification, the MiG-15bis was given long wing-fence pylons on each wing, coupled with new experimental rocket launch rails that were angled downwards, allowing the MiG-15bis-ISH to carry a large quantity of bombs (for a MiG-15) or a lot of downwards angled rockets for ground attack runs.

Introduced in Update 1.85 "Supersonic" as a premium pack, the MiG-15bis-ISH is arguably the best Soviet MiG-15 in-game, being at the same battle rating as the normal MiG-15, and lower than the tech tree MiG-15bis, the bis-ISH has access not only to a lot more ground-striking ordnance, but the powerful engine of the MiG-15bis, which more than offsets the added weight and drag of the comically large wing pylons.

The MiG-15bis ISH was removed from sale after the 2019 Birthday sale. It was since made temporarily available for purchase in-game during the 2021 and 2022 "Day of the Russian Aerospace Forces" mini-events. It was reintroduced permanently for purchase in-game for the 2023 anniversary of its maiden flight.