The Russian Army’s Super ‘2S4 Tyulpan’
The 2S4 Tyulpan was seen by the west for the first time in 1975, and so received the NATO designation M-1975, whereas its official designation is 2S4.
The 2S4 a laser-guided round consistently destroyed targets quickly, precisely, and with only a few rounds.
The 2S4 Tyulpan designs is based on the GMZ tracked minelaying vehicle carrying an externally mounted M-240 240 mm breech-loading mortar on the rear of the hull.
The 2S4 has a slow rate of fire, only one round per minute. This is due to the large size of the mortar and the weight of its ammunition
The 2S4s crew consist of a driver and the commander, plus an additional 3 support troops are needed to operate the mortar. The additional troops are usually carried by a separate armored personnel carrier.
Source : https://goo.gl/NU16VP