In 1996 the Russian Motovilikha Plants Corporation
fielded the latest of its Nona family, the 2S31 Vena, an automated
self propelled mortar, with a longer barrel, (Russian 120mm 2A80) also
firing the Gran laser-guided bomb against point targets to 13km range.
AMOS II mobile
The known version was mounted on a BMP-3 chassis and has
70 rounds on board storage ( about twice as much as the former).
A similar version was developed by the Chinese Army, designated
WZ 551 6x6 mounted on an armoured personnel carrier. Finally, as the
Russians seem to love super-big guns, they have designed the mammoth
420mm SP Oka mortar system, which was originally intended to fire
tactical nuclear rounds. Fortunately it was never commissioned.