A railway gun, also called railroad gun is a large artillery piece mounted on a railway truck or wagon.
French 320 mm railway gun during World War I
12 inch mortar railway artillery guns
German K-5 Railway gun "Leopold"
English railway guns
American 22 long riffle railway gun
274mm railroad gun captured in the U.S. Seventh Army
German Paris Gun
German Schwerer Gustav
TM-1-14 railroad gun
DAKOL (Dywizjon Artylerii KOLejowej)