Railway gun - Wikiwand

A railway gun, also called a railroad gun, is a large artillery weapon, built on, transported by, and fired from a specially designed railway wagon. Many countries have built railway guns, but the best known were made by Krupp and used by Germany in World War I and World War II. Smaller guns were often part of an armoured train.

17 cm SK L/40 gun - Wikiwand

27,4-cm-K (E) 592(f) (27,4 mm railroad gun) : Germany (DEU)

Aerial warfare during Operation Barbarossa - Wikipedia

14-inch M1920 railway gun - Wikiwand

Peigné-Canet-Schneider mle 1897 gun carriage - Wikiwand

List of railway artillery - Wikipedia

Canon de 32 modèle 1870/84 à glissement - Wikiwand

Lahitolle 95 mm cannon - Wikiwand

BL 14-inch railway gun - Wikiwand

14-inch/50-caliber railway gun - Wikiwand

Did the Italians have something similar to the M2 .50 cal HMG during WW2? - Quora

QF 6-pounder 6 cwt Hotchkiss - Wikiwand