15 cm Ring Kanone L/30

15 cm Ring Kanone L/30
A 15 cm Ring Kanone L/30 captured by the British at Cambrai.
Type	Naval gun Coastal artillery Siege gun
Place of origin	German Empire
Service history
In service	1883-1918
Used by	German Empire
Wars	World War I
Production history
Designer	Krupp
Designed	1883
Manufacturer	Krupp
Produced	1883
No. built	150
Specifications
Mass	10 t (9.8 long tons; 11 short tons)
Barrel length	4.47 m (14 ft 8 in) L/30[1]
Shell	Separate-loading, bagged charges and projectiles
Shell weight	40 kg (88 lb)
Caliber	149.1 mm (5.87 in)
Breech	Horizontal sliding-block
Recoil	None
Carriage	Box trail
Elevation	+35°[1]
Traverse	10°
Muzzle velocity	609 m/s (2,000 ft/s)
Maximum firing range	12.1 km (7.5 mi)[1]

The 15 cm Ring Kanone L/30 was a naval gun and coastal artillery piece that was used by the German Navy before the First World War. It was converted to a siege gun for the German Army during the First World War, when the ships that carried it were decommissioned.