CMK 1/35 CMK German WWI 25cm schwerer Minenwerfer / Heavy Mortar All Resin kit 1/35 ResinGerman heavy trench mortar of the Imperial German Army. It was designed before WWI by Rheinmetall and was in service until the end of the war. The mortar was transported using an attached pair of wheels and before fire, it was placed in a pit or trench protecting the mortar and its crew. Later in the war, a new model with a longer barrel was also developed and known as the n A (neuer Art). The earlier short barreled version was then redesignated as