![]() Ksp58B loaded with a non-disintegrating DM1 7.62mm ammunition belt in Lithuanian service The MAG takes zero shifts between barrel assemblies into account by making the front sight of the assemblies adjustable with the help of tools. ![]() The barrel assembly weighs 3,050 g (6.72 lb) and of the 630 mm (24.80 in) long barrel a portion of 487.5 mm (19.19 in) is rifled. Also attached to the barrel is the front sight base, carry handle and gas block (equipped with an exhaust-type gas regulator valve with three settings). The barrel's chamber and bore are chrome-lined or stellite-lined for increased service life and the barrel has four right-hand grooves with a 305 mm (1:12 in) rifling twist rate. The quick-change barrel has a slotted flash suppressor. For targets that can be fired on by a general-purpose machine gun for longer periods than just a few seconds, the cyclic firing rate becomes less important. A high cyclic rate of fire is advantageous for use against targets that are exposed to a general-purpose machine gun for a limited time span, like aircraft or targets that minimize their exposure time by quickly moving from cover to cover. ![]() The MAG is also equipped with a fixed wooden stock (later production models feature polymer furniture), pistol grip, and carrying handle.Ī user-adjustable gas valve allows regulating the cyclic rate of fire from 650 up to 1,000 rounds per minute, and subsidiary can adjust the gas system for various types of cartridge loadings or use in the presence of heavy fouling. The rear of the receiver has been reinforced and slotted to accept the butt stock. The bolt's guide rails are shaped downward to drive the locking lever into engagement with the locking shoulder, which is also riveted to the side plates. Guide rails that support the bolt assembly and piston extension during their reciprocating movement are riveted to the side plates. The front is reinforced to accept the barrel nut and gas cylinder which are permanently mounted. The MAG's receiver is constructed from sheet metal stampings reinforced by steel plates and rivets. 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. After firing, spent cartridge casings are removed downwards through an ejection port normally covered by a spring-loaded dust cover at the bottom of the receiver. Both the spring-powered extractor and ejector are contained in the bolt. The unlocking sequence starts after 15 mm (0.6 in) rearward gas piston rod movement to keep the breech block fully locked until the bullet has left the gun barrel and the high-pressure propellant gas pressure has dropped to a safe level. The locking shoulder and camming surfaces that guide the locking lever are located at the base of the receiver. 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 MAG operates via a long-stroke piston system, which utilizes the ignited powder gases generated by firing vented through a port in the barrel to propel a gas piston rod connected to the locking assembly. Design details Ī schematic showing the mechanism of the FN MAG. The MAG first entered production in 1958, and it is sometimes referred to as the MAG-58. Taking inspiration from the MG 42, the MAG was created firstly to help balance out inconsistent levels of firepower among pre-existing infantry arms, and secondarily in response to NATO standardisation of the 7.62×51mm round in 1954, with the machine gun serving as a complement to the FN FAL battle rifle. The FN MAG was designed by FN Herstal in the 1950s. The MAG is available in three primary versions: the standard, infantry Model 60-20 machine gun, the Model 60-40 coaxial machine gun for armoured fighting vehicles and the Model 60-30 aircraft variant. The weapon's name is an abbreviation for Mitrailleuse d'Appui Général, meaning "general support machine gun". It has been used by more than 80 countries and it has been made under licence in several countries, including Argentina, Canada (as the C6 GPMG), Egypt, India and the United Kingdom. The FN MAG is a Belgian 7.62 mm general-purpose machine gun, designed in the early 1950s at Fabrique Nationale (FN) by Ernest Vervier. Non-disintegrating DM1 or disintegrating M13 linked beltįolding leaf sight with aperture and notch, front blade Gas-operated long-stroke piston, open bolt
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