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The Farquhar–Hill rifle, a British design by Moubray G. Farquhar and Arthur H. Hill, was one of the first semi-automatic rifles designed in the early 20th century.

Rifle. .303 inch, Pattern 1918
Farquhar-Hill rifle.jpg
TypeSemi-Automatic rifle
Place of originUnited Kingdom
Service history
Used byRoyal Flying Corps
WarsWorld War I
Production history
DesignerMoubray G. Farquhar
Arthur H. Hill
Specifications
Cartridge.303 British
ActionRecoil (prototype)
Gas
Feed system19, 10 and 65 round drum magazines
SightsIron

DescriptionEdit

The rifle was tested in May 1908 and had many failures. Several improved designs followed, none of which completely satisfied the Small Arms Committee. The Farquhar-Hill is a long recoil operated semi-automatic rifle with rotary bolt locking. It was 0.303 in (7.7 mm) caliber and fed from a 19-round drum. Magazine variations included a 10-round truncated cone and a 65-round drum. It has a muzzle velocity of 732 m/s (2,400 ft/s) and is sighted to 1,500 yd (1,370 m). One example was tried in the United States late in the First World War using a drum magazine.

The British Army appears to have adopted and ordered the Farquhar–Hill rifle in 1918 but the termination of hostilities in Europe led to the cancellation of the order before any rifles were delivered. The rifle did see some service with British aviators, along the same lines as the Mauser M1916 and Mondragon rifles. For observers and gunners aloft, self-loading rifles were an enormous improvement over bolt-action weapons and self-loading rifles saw brief use before the practice of mounting machine guns in aircraft took hold.

The Farquhar-Hill was first patented in the UK in 1908 and in the United States in 1909. The key feature was an intermediate 'action' spring stored recoil energy. Upon discharge, the barrel recoiled while still locked with the bolt, compressing the intermediate spring on recoil. Upon return of the barrel to the forward position, the energy stored in the intermediate spring cycled the bolt back and forth, extracting and ejecting the spent case and feeding a fresh round into the now stationary barrel. The main goal was to achieve smooth and reliable cycling, but the design was very complicated and thus badly suited for a military firearm. By 1911, Farquhar and Hill revised their rifle, changing its source of energy from barrel recoil to more convenient gas operated action. The new weapon also used an intermediate spring as a source of energy for cycling of the bolt with a stationary barrel, simplifying design and making it potentially more accurate and reliable. The design was refined and then tested by British Army on several occasions. This rifle was initially chambered for the new ".303 rimless" round, designed by necking up the 7.65x53mm Belgian Mauser case and loading it with British-issue Mk.VII bullet of .303 caliber. Later on this experimental loading was discarded in favor of the standard issue .303 British ammunition. After several trials, including troop trials at the Front, in 1918 the Farquhar–Hill rifle was found to be suitable for military use and an official request was issued for procurement of as many as 100,000 Farquhar–Hill rifles for British forces fighting on the Continent against Germany. Official nomenclature assigned to the military Farquhar–Hill rifle in August 1918 was "Rifle. .303 inch, Pattern 1918". The Great War ended before production facilities were allocated for this rifle and manufacture of Farquhar–Hill rifles was cancelled in 1919.

During the 1920s and early 1930s Farquhar redesigned this rifle into a lightweight machine-gun fed from top-mounted pan magazines. On several occasions the British Army tested this machine gun, known as the Beardmore-Farquhar but ultimately rejected it for a variety of reasons.

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