I found out thanks to a other Game that the Naming of the Main “Gun” on the Churchill AVRE is misleading, since the Designation is telling us the Diameter of the Barrel and not the “Gun”/Firing Device which is a 29mm Tube. It is Technically not Wrong, but i would like a Specification to be added for it.
Something in the direction like 230mm Demolition Device on 29mm Spigot Mortar od similar.