130 mm/50 B13 Pattern 1936

130 mm/50 B13 Pattern 1936
130 mm/50 B-13 in Kuivasaari
Type	Naval and coastal gun
Place of origin	Soviet Union
Service history
In service	1935—1998
Used by	Soviet Union People's Republic of China Poland Egypt Indonesia Finland
Wars	Second World War
Production history
Designer	N. N. Magdasijev G. N. Rafalovits[1]
Designed	1929—1935[2]
Manufacturer	Bolshevik Plant no. 232[1]
Produced	1935—1954[2]
No. built	1199[2]
Specifications
Mass	5,180 kg (11,420 lb) (gun only)[1]
Length	6,581 mm (21 ft 7 in)
Barrel length	6,450 mm (21 ft 2 in) (bore) 5,199 mm (17 ft 1 in) (rifling)[2]
Crew	1+10 (B-13)[1]
Shell	130 x 846 mm R
Caliber	130 mm (5.1 in)
Breech	Screw breech[2]
Elevation	-5° — +45°[2]
Rate of fire	5-13 shots/min (depending on mounting)[1][2]
Muzzle velocity	820–870 m/s (2,700–2,900 ft/s) (depending on model and ammunition)[2]
Maximum firing range	25,597 m (27,993 yd)[2]

The 130 mm/50 B13 Pattern 1936 was a 130 mm (5.1 in) 50 caliber Soviet naval gun. The gun was used as a standard destroyer weapon during World War II, and it was also used as a coastal gun and railway gun. The gun was produced in three different versions which all had incompatible ammunition and range tables. Mountings for the weapon included single open mounts and twin turrets. Besides the Soviet Union, the gun was used on ships sold or donated to Poland, People's Republic of China, Egypt and Indonesia. Finland captured five guns during the Continuation War and used them until the 1990s.^[1][2]