QF 4 inch Mk XIX gun
The QF 4-inch Mk XIX gun was a British low-velocity 4-inch 40-calibre naval gun used to arm small warships such as and and some in World War II, mainly against submarines.
QF 4 inch Mk XIX gun

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- Name
- Ordnance QF 4 inch gun Mk XIX
- Field
- dual purpose gun · rifled breech loader · naval artillery
- Region
- United Kingdom
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Documentary summary
The QF 4-inch Mk XIX gun was a British low-velocity 4-inch 40-calibre naval gun used to arm small warships such as and and some in World War II, mainly against submarines.
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wikidata · Q7265444
In this article
Key facts
Key facts
• Name — Ordnance QF 4 inch gun Mk XIX • Type — Dual-purpose gun • Is Ranged — yes • Is Artillery — yes • Is Uk — yes • Service — 1939 • Used By — United Kingdom Canada Australia • Wars — World War II • Design Date — 1938 • Number — 2,023 • Part Length — 160 in bore (40 calibres) • Cartridge — Fixed QF HE, Starshell • Cartridge Weight — 35 lb • Caliber — 4 in • Velocity — 396 m/s • Max Range — 8870 m at +40° • Breech — horizontal sliding-block • Elevation — -10° to +60°
Ammunition
Ammunition
• Illustration — Canadian gunners with fixed rounds • Illustration — Starshell
Surviving examples
Surviving examples
• On Castlemaine at Williamstown, Victoria, Australia. • On the parade ground at the Irish Naval Service Base, Haulbowline, Co. Cork, Ireland
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- United Kingdom
Description
It succeeded the higher-velocity World War I-era BL 4-inch Mk IX (typically deployed on s in the escort role). The Mk XIX fired fixed ammunition which was 38.5 in long and weighed 50 lb. The weight of the projectile was increased from 31 lb for the Mk IX to 35 lb for the Mk XIX. The high-angle mounting used for the XIX added some anti-aircraft capability and allowed it to fire starshells to illuminate the battle area at night.
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Context
The circumstances in which QF 4 inch Mk XIX gun stands. Recorded as a kind of rifled breech loader.
Notes from the source article
Cited by Wikipedia
Notes from the source article
These works are cited by the source article, in its own numbering. They are recorded as its citations, not as sources VALÉORINE has verified.
- 1.Tony DiGiulian. United Kingdom / Britain 4"/40 (10.2 cm) QF Mark XIX. NavWeaps.
- 2.http://navalhistory.flixco.info/H/119171x53535/8330/a0.htm : quotes from John Campbell, "Naval Weapons Of World War Two", Annapolis : Naval Institute Press, 1985,
- 3.Mk XIX = Mark 19. Britain used Roman numerals to denote Marks (models) of ordnance until after World War II. This was the nineteenth model of British QF 4-inch gun
- 4.DiGiulian
Bibliography printed in the source article · 1
- John Campbell, "Naval Weapons Of World War Two", Annapolis : Naval Institute Press, 1985,
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Broader subject
1- dual purpose gunTerminology
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QF 4 inch Mk XIX gun is classified as a dual purpose gun, rifled breech loader or naval artillery. Associated with United Kingdom. Connected to 2 other published records in the VALÉORINE Encyclopedia.
Within the Encyclopedia
The Encyclopedia exists whether or not anything is for sale. Corrections are recorded rather than overwritten, and every version of this record is kept. Published 14 August 2026.
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