The 2-pounder gun, officially the QF 2-pounder (QF denoting "quick firing") and universally known as the pom-pom, was a 40 mm (1.6 in) British autocannon...

The QF 4 inch Mk V gun was a Royal Navy gun of World War I which was adapted on HA (i.e. high-angle) mountings to the heavy anti-aircraft role both at...

being replaced in the 1920s by the QF 4-inch (100 mm) Mk V on HA (high-angle) mounting. Britain entered World War I with no anti-aircraft artillery. When...

The QF 4-inch gun Mk IV was the main gun on most Royal Navy and British Empire destroyers in World War I. It was introduced in 1911 as a faster-loading...

Royal Navy gun, see 4.5 inch Mark 8 naval gun. Like all British nominally 4.5 inch naval guns, the QF Mk I has an actual calibre of 4.45 inches (113 mm)...

The QF 12-pounder 12-cwt gun (Quick-Firing) (abbreviated as Q.F. 12-pdr. [12-cwt.]) was a common, versatile 3-inch (76.2 mm) calibre naval gun introduced...

The QF 4.7-inch Gun Mks I, II, III, and IV were a family of British quick-firing 4.724-inch (120 mm) naval and coast defence guns of the late 1880s and...

The QF 3-pounder Hotchkiss or in French use Canon Hotchkiss à tir rapide de 47 mm were a family of long-lived light 47 mm naval guns introduced in 1886...

The Ordnance QF Hotchkiss 6 pounder gun Mk I and Mk II or QF 6 pounder 8 cwt were a family of long-lived light 57 mm naval guns introduced in 1885 to...

Monitors Wikimedia Commons has media related to QF 3 pounder Vickers. Tony DiGiulian, British Vickers 3-pdr (1.4 kg) (1.85"/50 (47 mm)) QF Marks I and II...

based on the barrel of the QF 4-inch Mk V and the breech mechanism of the BL 4-inch Mk VIII and was first introduced in World War I on capital ships as secondary...

Vickers .5-inch, Mk. II Vickers MG Collection & Research Association Williams, The .5" Vickers Guns and Ammunition Gun, Machine, Vickers .5-inch, Mk. IV Vickers...

The Ordnance QF 12-pounder 8 cwt was a Royal Navy "landing gun" intended for navy use ashore. "8 cwt" refers to the weight of the gun and breech, approximately...

and the start of the 20th century. In UK service it was known as the QF 6-inch Mk I, II, III guns. As the 15 cm/40 (6") 41st Year Type naval gun it was...

1950s. The gun superseded the QF six-inch gun of the 1890s, a period during which the Royal Navy had evaluated QF technology (i.e. loading propellant charges...

The QF 4-inch gun Mks I, II, III were early British QF (quick-firing) naval guns originating in 1895. They all had barrels of 40 calibres length. The gun...

The BL 15-inch Mark I succeeded the BL 13.5-inch Mk V naval gun. It was the first British 15-inch (380 mm) gun design and the most widely used and longest...

George V-class battleships, laid down 1911 The gun was succeeded in the "heavy" 4-inch class on new warships commissioned from 1914 onwards by the QF 4-inch...

led to failure with the 50-calibre Mk XI and Mk XII guns; the Mk X was the last successful 12-inch British gun. Mk X guns were mounted in the following...

warships by the QF 6-inch gun from 1891. These were Royal Gun Factory designs, although they were also manufactured by Elswick Ordnance. Mk II followed the...

naval gun when World War I began. It was superseded as secondary armament on new battleships in the 1920s by the 50-calibre 6-inch Mk XXII gun, and as main...

MASCHINENKANONE IN THE HERERO WAR". "Handbook of the 1-PR. Q.F. Gun", 1902. Page 19, Range Table for British Mk I gun. Muzzle Velocity of 1,800 ft/second, firing...

for Ordnance QF, 18-pr Mks I to V 2CRH Shrapnel, 4/7.5 CRH HE, 1929 Range Table for Ordnance QF, 18-pr Mks I to IV 2CRH Shrapnel, 4/7.5 CRH HE, 1929 "Obus...

capital ships from 1909 onwards by the far more powerful BL 4-inch Mk VII gun. In World War I four guns were landed for service in the East Africa campaign...

The BL 7.5-inch Mk II–Mk V guns were a variety of 50-calibre naval guns used by Britain in World War I. They all had similar performance and fired the...

The BL 9.2-inch Mk IX and Mk X guns were British breech loading 9.2-inch (234 mm) guns of 46.7 calibre, in service from 1899 to the 1950s as naval and...

developed in parallel with the QF 18-pounder used by Royal Field Artillery. The original Mk I barrel was wire wound. Later Mk II barrels had a tapered inner...

the worn-out Mk I guns on surviving ships. These were the only BL-type 4.7-inch guns in British service, all others have been of the QF-type. They were...

the "Tsetse" (after the Tsetse fly). Officially the QF 6-pdr Class M Mark I with Auto Loader Mk III, it was based on the long-barrelled (50 calibre)...

being HMS Scylla and HMS Charybdis, which mounted QF 4.5-inch Mk III guns due to shortages of the 5.25-inch gun. The last five of the Dido class also...