BL 4 inch Mk VII gun

The BL 4-inch gun Mk VII was a British high-velocity naval gun introduced in 1908 as an anti-torpedo boat gun in large ships, and in the main armament of smaller ships. Of the 600 produced, 482 were still available in 1939 for use as coastal artillery and as a defensive weapon on Defensively Equipped Merchant Ships (DEMS) during the Second World War.

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1908 — 1945  Wikimedia, Wikidata
600 produced, 
naval artillery, rifled breech loader, Royal Navy, United Kingdom of Great Britain and Ireland, 

30 mm Breda-Mauser, Canon de 24 C modèle 1864, HMS Ajax, Lion-class battlecruiser, naval artillery, rifled breech loader, 

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Location: KML, Cluster Map, Maps,

Frameless

ATurretGunsHMASAustralia1914

BL 4 inch Mk VII gun East Africa WWI

The Royal Navy on the Home Front, 1914-1918 Q18806

BL 4 inch Mk VII Gun Breech Diagram

BL 4 inch Mk VII gun on field carriage

BL 4 inch Mk VII gun barrel diagram

Visitors aboard HMS New Zealand Vancouver 1913

BL 4 inch Mk VII Gun Percussion & Electric Locks Diagram

BL 4 inch Mk VII guns East Africa Campaign

Rear-Admiral William Pakenham Feb 1917 LAC 3219658

Type	Subtype	Date	Description	Notes	Source
commons	image		ATurretGunsHMASAustralia1914		Commons
commons	image		BL 4 inch Mk VII gun East Africa WWI		Commons
commons	image		The Royal Navy on the Home Front, 1914-1918 Q18806		Commons
commons	image		BL 4 inch Mk VII Gun Breech Diagram		Commons
commons	image		BL 4 inch Mk VII gun on field carriage		Commons
commons	image		BL 4 inch Mk VII gun barrel diagram		Commons
commons	image		Visitors aboard HMS New Zealand Vancouver 1913		Commons
commons	image		BL 4 inch Mk VII Gun Percussion & Electric Locks Diagram		Commons
commons	image		BL 4 inch Mk VII guns East Africa Campaign		Commons
commons	image		Rear-Admiral William Pakenham Feb 1917 LAC 3219658		Commons