82-PM-37
| 82mm M1937 Battalion Mortar | |
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| Type | Infantry mortar |
| Place of origin | Soviet Union |
| Service history | |
| Used by |
 Soviet Union
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| Wars | World War II |
| Specifications | |
| Weight | 56 kilograms (123 lb) |
| Barrel length | 1.22 metres (4 ft) |
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| Shell | 3.05 kg (6 lb 12 oz) |
| Caliber | 82 millimetres (3.2 in) |
| Elevation | +45° to +75° |
| Traverse | 6° to 15° |
| Rate of fire | 25 -30 rpm |
| Muzzle velocity | 211 m/s (690 ft/s) |
| Maximum firing range | 3,040 m (3,320 yd) |
The M-37 or 82-BM-37 (батальонный миномёт) is a Soviet 82 millimeter calibre mortar designed by B.I. Szayrin 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.
The M-37M is an improved version with lighter base plate and a device to prevent double loading.
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Wikipedia