Mortars
Many vehicles have used ancillary smoke mortars for local defense. Some vehicles are mortar carriers and carry a mortar as a primary weapon. Vehicles with a mortar as a primary weapon that is mounted to be fired within the vehicle include the U.S. M4 half-track. Tanks such as the Israeli Makmat on the M4 Sherman tank chassis have also mounted mortars.
The Russian army uses a 2S4 Tyulpan (Tulipin) self-propelled 240 mm heavy mortar. Patria Hägglunds, a joint venture between Finnish Patria and Swedish BAE Systems Hägglunds manufactures AMOS (Advanced Mortar System) which is a 120 mm automatic twin barrelled, breech loaded mortar turret.
Read more about this topic: Self-propelled Artillery