The Winchester-Burton Light Machine Rifle or Burton M1917 LMR (known colloquially as the Burton) is an early

automatic rifle An automatic rifle is a type of Self-loading rifle, autoloading rifle that is capable of fully automatic firearm, automatic fire. Automatic rifles are generally selective fire, select-fire weapons capable of firing in Semi-automatic firearm, semi ...

designed by Frank F. Burton in 1917. It is thought to have been designed for destroying enemy observation balloons, but the theory is unconfirmed. It is one of the first true

assault rifles An assault rifle is a select fire rifle that uses an intermediate-rifle cartridge and a detachable magazine.C. Taylor, ''The Fighting Rifle: A Complete Study of the Rifle in Combat'', F.A. Moyer ''Special Forces Foreign Weapons Handbook'', ...

Design and development

In 1916, Frank F. Burton began developing the rifle, creating a single example. The most prominent feature of the Burton LMR is the twin 20-round box magazines positioned 30° left and right from the rifle's line of sight. The magazines have two locking catches on the front, and one over-travel stop on the back, that allow one magazine to feed whilst placing the other on standby. The only extant example (now at the Cody Firearms Museum) of the LMR has two interchangeable barrels: ground and airborne. The infantry barrel is equipped with a bayonet lug. Both barrels feature cooling fins similar to later weapons such as the Thompson 1928. The primary trigger is housed within the trigger guard, and is used to fire in semi-automatic. The LMR utilises an additional trigger located under the trigger guard as the select-fire mechanism. Squeezing the trigger causes the sear to be locked in place, allowing the bolt to return for fully-automatic fire. It features an open bolt with a simple blowback operation to cycle new rounds and eject spent casings downward. The charging handle is also shaped like a trigger and is located on the bottom of the receiver. The Burton LMR meets the majority of requirements needed to be classified as an

assault rifle An assault rifle is a select fire rifle that uses an intermediate cartridge, intermediate-rifle cartridge and a Magazine (firearms), detachable magazine.C. Taylor, ''The Fighting Rifle: A Complete Study of the Rifle in Combat'', F.A. Moyer '' ...

; it is select-fire, magazine fed, chambered in an intermediate cartridge, and can be shoulder-fired. It is the only known assault rifle to use a simple blowback operation.

Ammunition

The .345 Winchester Self-Loading is a straight walled rimless,

centerfire Two rounds of .357 Magnum, a centerfire cartridge; notice the circular primer in the center A center-fire (or centerfire) is a type of metallic cartridge used in firearms, where the primer is located at the center of the base of its casing (i. ...

intermediate cartridge created in 1917 by Frank Burton for the light machine rifle. The cartridge was created by modifying .351 Winchester Self-Loading shells and fitting an 8.8mm spitzer bullet. It is speculated that the bullet is large enough to house an incendiary component, however the original ammunition cards do not specify an incendiary capability.

In popular culture

* The rifle was added to

Battlefield 1 ''Battlefield 1'' is a 2016 first-person shooter game developed by DICE and published by Electronic Arts. It is the tenth installment in the ''Battlefield'' series and the first main entry in the series since ''Battlefield 4'' in 2013. It was ...

in 2018.

References

Sources

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External links