152 mm howitzer-gun M1937
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The 152 mm howitzer-gun M1937 (ML-20), is a Soviet heavy gun-howitzer. The gun was developed by the design bureau of the plant no 172, headed by F. F. Petrov, as a deep upgrade of the 152-mm gun M1910/34, in turn based on the 152-mm siege gun... Wikipedia
Breech: interrupted screw
Caliber: 152.4 mm (6 in)
Carriage: split trail
Elevation: −2° to 65°
Length: 8.18 m (26 ft 10 in) (with limber; barrel pulled back)
Mass: combat: 7,270 kg; (16,027 lb); travel: 7,930 kg; (17,482 lb)
Maximum firing range: 17.23 km (10.7 mi)