Linebarrels of IronLinebarrels of Iron.

Linebarrels of Iron (鉄のラインバレル, Kurogane no Rainbareru) is a Japanese manga series written by Eiichi Shimizu and illustrated by Tomohiro Shimoguchi. The series was first serialized in Akita Shoten's monthly seinen manga magazine, Champion Red, in 2005. It has since been compiled into 24 tankōbon, as of October 20, 2014.