I found a duplication glitch that can let you duplicate any rails.
It involves pistons, and it is easy to duplicate.
MC-8142
Duplication Glitch with Rails
Resolved
Duplicate
0
Andrew Kane
(Unassigned)
Unconfirmed
Snapshot 13w03a
Retrieved
Duplicate of MC-6903, please use the search function to see if your bug has already been submitted. Currently over 45% of tickets are being closed as duplicate.