82-BM-37
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The M-37 or 82-BM-37 is a Soviet 82 millimeter calibre mortar designed by B.I. Shavyrin and accepted into service in 1937. The design of the M-37 is based on the earlier French Brandt mle 27/31 mortar with Russian modifications. Wikipedia
Barrel length: 1.22 metres (4 ft)
Caliber: 82 millimetres (3.2 in)
In service: 1937-Present
Mass: 56 kilograms (123 lb)
Maximum firing range: 3,040 m (3,320 yd)
Muzzle velocity: 211 m/s (690 ft/s)
Place of origin: Soviet Union