GIRSignals-2.1.52.jar is a release file of the Minecraft mod Open Signals for Forge, made for Minecraft 1.12.2. It was published on October 11, 2022 and is 0.7 MB in size. For the full description, screenshots and every other version, visit the Open Signals mod page.
How to install: Put the .jar into the mods folder (.minecraft/mods) and start Minecraft with the matching mod loader profile.
