M-1978 Koksan

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M-1978 Koksan 주체포
A North Korean M-1989 version of Koksan photographed in North Korea in 2013.
Type	Self-propelled artillery
Place of origin	North Korea
Service history
In service	1978–present
Used by	North Korea Iran
Wars	Iran–Iraq War
Production history
Manufacturer	Second Machine Industry Bureau, North Korea
Variants	M-1978 Koksan M-1989 Koksan
Specifications
Crew	8
Caliber	170 mm
Rate of fire	~1-2 rounds per 5 minutes
Effective firing range	~40 km (standard munition), 60 km (booster munition)[1]
Maximum firing range	60 km (with RAP round)
Main armament	170 mm (6.69") gun
Engine	Diesel
Suspension	Torsion bar
Operational range	~300 km
Maximum speed	~40 km/h

The M-1978 Koksan (Korean: M-1978 곡산; Hanja: M-1978 谷山), or officially Chuch'ep'o (Chuch'e Cannon; Korean: 주체포; Hanja: 主體砲) is a 170 mm self-propelled gun of North Korean design and manufacture. Very little information is available due to the secretive nature of the North Korean government. The designations M-1978 and Koksan were given to the type by US military analysts, as they first became aware of it in that year in Koksan, North Korea.^[2]

What is known is that it is a 170 mm (6.69 in) self-propelled gun of the open turret type. It was first seen publicly during a military parade in 1985. At least one example has been acquired by the United States, likely taken from examples captured by Iraq during the Iran-Iraq War.