arc-upgrader-items-1.2.1-fabric+1.21.11.jar is a release file of the Minecraft mod Arc Upgrader Items for Fabric, made for Minecraft 1.21.11. It was published on September 23, 2026 and is 0.1 MB in size. For the full description, screenshots and every other version, visit the Arc Upgrader Items mod page.
How to install: Put the .jar into the mods folder (.minecraft/mods) and start Minecraft with the matching mod loader profile.
