37 mm trench gun M1915
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37-mm trench gun M1915 was a Russian battalion gun employed in World War I.
With World War I switching into a trench warfare phase late in 1914, a need for a highly mobile artillery system to be used against enemy machine gun emplacements and... Wikipedia
Caliber: 37 mm (1.45 in)
Maximum firing range: 3.2 km (2 mi)
Muzzle velocity: 442 m/s (1,450 ft/s)
Shell: Fixed QF 37 x 94 mm R; HE, APHE, APHE-T, AP, AP-T, Canister