Type 1915 305 mm howitzer (Russian: 305-мм гаубица образца 1915 года) was a Russian heavy howitzer that saw service during World War I and II. Originally intended for Naval use, it was later purchased by the Army at a cost of 271,500 Rubles per piece, with the first order of 8 being sent on 13 August 1915.

Type 1915 305 mm howitzer
Type 1915 in Saint Petersburg Artillery Museum.
Type	Heavy gun
Place of origin	Russian Empire
Service history
Used by	Russian Empire, Soviet Union
Wars	World War I, World War II
Specifications
Mass	63.9 t (140,874 lbs)
Caliber	305 mm (12 in)
Elevation	58°
Traverse	60°
Rate of fire	0.3 rounds per minute
Muzzle velocity	442 m/s (1,450 ft/s)
Maximum firing range	13.47 km (8.36 mi)