RailsDupeFix
by Headroomov
RailsDupeFix stops a rail duplication glitch in which pistons leave rails immovable after block movement.
What it does
The mod targets a vanilla edge case: when a piston pushes blocks, rails can be displaced or broken, and some arrangements let players exploit the result to duplicate rails. RailsDupeFix corrects that interaction so rails keep moving normally under piston action. It is a server-side only Fabric mod, so players join without installing it, and the mod is released under the MIT License as open source. Its only published files target 26.1.2, dated 2026-06-10.
Key features
Piston rail movement
Rails pushed by pistons move as expected instead of becoming immovable.
Duplication glitch prevention
The vanilla edge case where displaced rails break and can be duplicated is corrected on the server.
Lightweight design
The mod is small and changes only the piston and rail interaction, leaving other mechanics untouched.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Questions
Does RailsDupeFix need to be installed on player clients?
Which Minecraft version does RailsDupeFix support?
In the catalog
RailsDupeFix is one of 36,990 Utility mods on ModsFinder, and one of 25,772 Utility mods for Fabric. 15,189 mods support Minecraft 26.1.2.
More from Headroomov
Similar mods
What the author says
RailsDupeFix is a lightweight server-side Fabric mod that prevents rail duplication caused by piston interactions by making rails immovable. It fixes a vanilla edge case where rails can be displaced or broken during piston block movement, which can be exploited for duplication glitches.
Official listing
- Modrinth page
- modrinth.com/mod/railsdupefix
- Owner
- Headroomov
- Published
- 2026-06-10
- Updated on Modrinth
- 2026-06-10
- Facts verified
- 2026-10-15