Reply #7: Here's one that will really ruin your day:

[formercia]

and reportedly in the Iraqi inventory...

http://en.wikipedia.org/wiki/2S4_Tyulpan



The 2S4 Tyulpan ( English: tulip) is a Soviet self-propelled mortar. "2S4" is its GRAU designation.

It was identified for the first time in 1975 in the Soviet army and so was called M-1975 by NATO, whereas its official designation is SM-240(2S4). Its design is based on the GMZ tracked minelaying vehicle carrying an externally mounted M-240 240 mm breech-loading mortar on the hull rear.

The crew consists of four men, but an extra five are required to operate the mortar. This has a range of 9,650 m but an extended range munition exists with a possible range of 20,000 m. Due to the large size of the weapon and the weight of the ammunition (130 kg for a standard projectile) it has a slow rate of fire: one round per minute. In addition to the high explosive bombs, it can fire armour-piercing, chemical and nuclear rounds. It can also fire the "Smel'chak" (daredevil), a laser-guided round.

Tyulpan is currently the heaviest mortar in deployment among any country.