JJSK3.9.9.jar is a release file of the Minecraft mod JJSK for Forge, made for Minecraft 1.20.1. It was published on February 10, 2026 and is 27.5 MB in size. For the full description, screenshots and every other version, visit the JJSK mod page.
How to install: Put the .jar into the mods folder (.minecraft/mods) and start Minecraft with the matching mod loader profile.
