Monday, November 30, 2009

The Best Targeter Bren Light Machine Guns


Bren Gun

The Bren (from Brno, the Czechoslovak city of design, and Enfield, site of the British Royal Small Arms Factory), usually called the Bren Gun, was a series of light machine guns adopted by Britain in the 1930s and used in various roles until 1991. While best known for its role as the British and Commonwealth forces' primary infantry light machine gun (LMG) in World War II, it was also used in the Korean War and saw service throughout the latter half of the 20th century, including the 1982 Falklands War and the 1991 Gulf War.

The Bren was a modified version of a Czechoslovak-designed light machine gun, the ZB vz. 26, which British Army officials had tested during a firearms service competition in the 1930s. The later Bren featured a distinctive curved box magazine, conical flash hider and quick change barrel. In the 1950s the Bren was rebarrelled to accept the 7.62x51mm NATO cartridge. Although fitted with a bipod, it could also be mounted on a tripod or vehicle-mounted.

The Bren was replaced as the section LMG by the L7 general purpose machine gun (GPMG), a heavier belt-fed weapon. This was in turn supplemented in the 1980s by the L86 Light Support Weapon firing the 5.56x45mm NATO round, leaving the Bren only in use on some vehicles.

As of November 2007, the Bren is still manufactured by Indian Ordnance Factories as the "Gun, Machine 7.62mm 1B".[1]

Development

The British Army adopted it in 1935 following extensive trials of the Czechoslovak ZB vz.26 light machine gun manufactured in Brno, although the ZB vz. 26 was not actually submitted for the trials; a slightly modified model was submitted, the ZB vz. 27. A licence to manufacture was sought and the Czech design was modified to British requirements. The major changes were in the magazine and barrel. The magazine was curved in order to feed the rimmed .303 British cartridge, a change from the various rimless Mauser-design cartridges used to date, such as the 7.92 mm Mauser round. These modifications were categorised in various numbered designations, ZB vz. 27, ZB vz. 30, ZB vz. 32, and finally the ZB vz. 33, which became the Bren.

Other weapons that were submitted for the trials were: the Madsen, Vickers-Berthier, Browning Automatic Rifle (BAR), and the Neuhausen KE7. The Vickers-Berthier was later adopted by the Indian Army and also saw extensive service in WWII.

A gas-operated weapon, the Bren used the same .303 ammunition as the standard British rifle, the Lee-Enfield, firing at a rate of between 480 and 540 rounds per minute (rpm), depending on model. Each gun came with a spare barrel that could be quickly changed when the barrel became hot during sustained fire, though later guns featured a chrome-lined barrel which reduced the need for a spare. The Bren was magazine-fed, which slowed its rate of fire and required more frequent reloading than British belt-fed machine guns such as the larger .303 Vickers machine gun. However, the slower rate of fire prevented more rapid overheating of the Bren's air-cooled barrel, and the Bren was several pounds lighter than belt-fed machine guns. Because it was more easily portable, it could be fired on the move and from standing positions. The magazines also prevented the ammunition from getting dirty, which was more of a problem with the Vickers with its 250-round canvas belts.




RPK
The RPK (Ruchnoy Pulemyot Kalashnikova, Russian: Ручной пулемёт Калашникова or "Kalashnikov hand-held machine gun") is a 7.62x39mm light machine gun of Soviet design, developed by Mikhail Kalashnikov in the late 1950s, parallel with the AKM assault rifle. It was created as part of a program designed to standardize the small arms inventory of the Red Army, where it replaced the 7.62x39mm RPD light machine gun. The RPK continues to be used by the armed forces of countries of the former Soviet Union and certain African and Asian nations. The RPK was also manufactured in Bulgaria and Romania.

Features

The RPK has a new, heavier and extended barrel with an increased heat capacity. The chrome-lined barrel is permanently fixed to the receiver and cannot be replaced in the field. It is fitted with a new front sight base, gas block (lacks the bayonet lug) and an under-barrel cleaning rod guide. The barrel also features a folding bipod, mounted near the muzzle and a front sight base with a lug that limits the bipod's rotation around the barrel. The barrel's muzzle is threaded, enabling the use of a blank-firing adaptor. When the blank-firing attachment is not used, the threading is protected by a thread protector cap from the AK. The barrel is pinned to the receiver in a modified trunnion, reinforced by ribbing, and is slightly wider than the trunnion used in the AKM. Symmetrical bulges on both sides of the barrel chamber ensure proper fit inside the receiver.

The RPK receiver cover is stamped from a smooth 1.5 mm (0.1 in) sheet of steel (compared to only 1 mm sheet metal used in the AKM). Interchangeability of parts between the RPK and AKM is quite significant.

The RPK uses a different recoil mechanism as compared to the AKM, which consists of a rear spring guide rod from the AK, and a new forward flat guide rod and coil spring.

The RPK features a thicker wooden forearm, a fixed wooden buttstock shaped like the RPD stock, optimized for prone firing, and a pistol grip from the AKM.

The weapon is fed from box magazines with a 40-round capacity or a 75-round drum magazine, both are compatible with magazines used with the AK-47 and AKM series.



FN MAG

The MAG is a Belgian 7.62 mm general purpose machine gun, designed in the early 1950s at Fabrique Nationale (FN) by Ernest Vervier. It is used by almost 70 countries, in 25 of those countries it is a standard-issue support weapon, it was produced locally in eight countries (Argentina, Egypt, India, Singapore, Sweden, Taiwan, the USA and the United Kingdom). The weapon’s name is an abbreviation for Mitrailleuse d'Appui Général[1]—"general purpose machine gun" (GPMG). The MAG is available in three primary versions: the standard, heavy infantry Model 60-20 machine gun, the Model 60-40 coaxial machine gun for armoured fighting vehicles and the Model 60-30 aircraft variant.

Operating mechanism

The MAG uses ignited powder gases vented through a port in the barrel to propel a gas piston rod connected to the locking assembly (it uses a long-stroke piston system). The barrel breech is locked with a vertically-tilting, downward locking lever mechanism that is connected to the bolt carrier through an articulated joint. The locking shoulder and camming surfaces that guide the locking lever are located at the base of the receiver. The MAG uses a series of proven design concepts from other successful firearms, for example the locking mechanism is modeled on that of the Browning M1918 (BAR) automatic rifle, and the feed and trigger mechanisms are from the WWII-era MG42 universal machine gun.

The MAG fires from an open bolt. Both the spring-powered extractor and ejector are contained in the bolt. After firing, spent cartridge casings are removed through an ejection port located at the base of the receiver (a spring-loaded dust cover of the MG42 type covers the ejection port). The machine gun has a striker firing mechanism (the bolt carrier acts as the striker as it contains a channel that houses the firing pin, which protrudes out from the surface of the bolt upon firing), an automatic-only trigger assembly and a manual cross-bolt push-button safety, which is located above the pistol grip. With the safety placed in the “safe” setting, the sear mechanism is disabled. The safety can only be engaged with the weapon cocked







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