copperagebackport-fabric-1.21.1-0.1.5.jar is a beta file of the Minecraft mod Copper Age Backport for Fabric, made for Minecraft 1.21.1. It was published on September 27, 2026 and is 2.4 MB in size. Pre-release builds can contain bugs — back up your world before installing. For the full description, screenshots and every other version, visit the Copper Age Backport mod page.
How to install: Put the .jar into the mods folder (.minecraft/mods) and start Minecraft with the matching mod loader profile.
