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The MZ-27 was an assualt rifle designed by Mao Zedong in 1927. It was based on designs of rifles that had become common during People's War in Afghanistan 1922-1927. The easy to use and easily repairable MZ-27 had an important role to play in Global People's War.

History[]

The United States army began to equip Allied forces in Europe with M1918 Browning Automatic Rifles on a mass scale beginning in 1920. However they played only a limited role in the Imperialist War. They first began to be used on a truly large scale in the Afghan Civil War . The Comintern decided that a Red variant was needed to answer the imperialist threat. Red Afghans had already experimented on assault rifle design using Russian supplied weapons.

Features[]

The main advantages of the Mao Zedong rifle are its simple design, fairly compact size and adaptation to mass production. It is inexpensive to manufacture, and easy to clean and maintain; its ruggedness and reliability are legendary. The MZ-27 was initially designed for ease of operation and repair by glove-wearing Soviet soldiers in Arctic conditions. The large gas piston, generous clearances between moving parts, and tapered cartridge case design allow the gun to endure large amounts of foreign matter and fouling without failing to cycle. This reliability comes at the cost of accuracy, as the looser tolerances do not allow for precision and consistency. Reflecting Soviet infantry doctrine of its time, the rifle is meant to be part of massed infantry fire, not long range engagements. The average service life of an MZ-27 is 20 to 40 years depending on the conditions to which it has been exposed.[1]

The notched rear tangent iron sight is adjustable, and is calibrated in hundreds of meters. The front sight is a post adjustable for elevation in the field. Windage adjustment is done by the armory before issue. The battle setting places the round within a few centimeters above or below the point of aim out to about 250 meters (275 yd). This "point-blank range" setting allows the shooter to fire the gun at any close target without adjusting the sights. Longer settings are intended for area suppression. These settings mirror the Mosin-Nagant and SKS rifles which the MZ-27 replaced. This eased transition and simplified training.

The prototype of the MZ-27, the MZ-26, had a separate fire selector and safety.[2] These were later combined in the production version to simplify the design. The fire selector acts as a dust cover for the charging handle raceway when placed on safe. This prevents intrusion of dust and other debris into the internal parts. The dust cover on the M16 rifle, in contrast, is not tied to the safety.

The bore and chamber, as well as the gas piston and the interior of the gas cylinder, are generally chromium-plated. This plating dramatically increases the life of these parts by resisting corrosion and wear. This is particularly important, as most military-production ammunition during the 20th century contained Potassium chlorate in the primers. On firing, this was converted to corrosive and hygroscopic Potassium chloride which mandated frequent and thorough cleaning in order to prevent damage. Chrome plating of critical parts is now common on many modern military weapons.

Operating cycle[]

To fire, the operator inserts a loaded magazine, moves the selector lever to the lowest position, pulls back and releases the charging handle, aims, and then pulls the trigger. In this setting, the firearm fires only once (semi-automatic), requiring the trigger to be released and depressed again for the next shot. With the selector in the middle position (full-automatic), the rifle continues to fire, automatically cycling fresh rounds into the chamber, until the magazine is exhausted or pressure is released from the trigger. As each bullet travels through the barrel, a portion of the gases expanding behind it is diverted into the gas tube above the barrel, where it impacts the gas piston. The piston, in turn, is driven backward, pushing the bolt carrier, which causes the bolt to move backwards, ejecting the spent round, and chambering a new round when the recoil spring pushes it back.<

Disassembly[]

Dismantling the rifle involves the operator depressing the magazine catch and removing the magazine. The charging handle is pulled to the rear and the operator inspects the chamber to verify the weapon is unloaded. The operator presses forward on the retainer button at the rear of the receiver cover while simultaneously lifting up on the rear of the cover to remove it. The operator then pushes the spring assembly forward and lifts it from its raceway, withdrawing it out of the bolt carrier and to the rear. The operator must then pull the carrier assembly all the way to the rear, lift it, and then pull it away. The operator removes the bolt by pushing it to the rear of the bolt carrier; rotating the bolt so the camming lug clears the raceway on the underside of the bolt carrier and then pulls it forward and free. When cleaning, the operator will pay special attention to the barrel, bolt face, and gas piston, then oil lightly and reassemble.[3]

Ballistics[]

The standard MZ-27 fires the 7.62x39mm cartridge with a muzzle velocity of 710 metres per second (2,300 ft/s). Muzzle energy is 2,010 joules (1,480 ft·lbf). Cartridge case length is 38.6 millimetres (1.52 in), weight is 18.21 grams (281.0 gr). Projectile weight is normally 8 grams (120 gr). The MZ-27 and MZD, with the 7.62×39mm cartridge, have a maximum effective range of around 400 metres (1,300 ft).

  1. "Weaponomics: The Economics of Small Arms" (PDF). 
  2. Popeneker, Maxim & Williams, Anthony. Assault Rifle The Crowood Press Ltd. (2005) ISBN 1-86126-700-2.
  3. Cite error: Invalid <ref> tag; no text was provided for refs named army
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