 The Tyulpan is the largest mortar system in use today.Following World War 2, the Soviet Union developed two types of heavy infantry mortar in 160 and 240 mm calibres, both conventional albeit breech-loaded designs.Due to do their relatively large dimensions, total mass and the heavy weight of their projectiles (and the M-240 in particular), these mortars could hardly hope to function in the field as infantry weapons, losing the features making such weapons desirable, that is their relatively simple operation, speed of deployment and mobility.