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Mg81
MG81
Country of origin

Germany

Designer(s)

Mauser

Weapon type

Machine gun

Caliber

7.92×57mm Mauser

Action

Recoil-operated

Overall length

915mm
965mm (with flash hider)

Weight

6.5 kg (MG 81)
12.9 kg (MG 81Z)

Cyclic rate

1400-1600 RPM (MG 81)
2800-3200 RPM (MG 81Z, combined)

Muzzle velocity

705-790 m/s, depending on ammunition type

The MG 81 was a belt-fed machine gun developed for fixed or flexible installations in World War II Luftwaffe aircraft, replacing the older MG 15.

The MG 81 was developed by Mauser as a derivative of their successful MG34 infantry machine gun. Development focus was to reduce production cost and time and to optimize for use in aircraft. Developed in 1938/1939, it was in production from 1940 to 1945.

A special twin-mounted version, the MG 81Z (Zwilling, meaning "twin") was introduced in 1942, which paired up two of the weapons on one mount. This was meant to provide even more firepower with a combined maximum cyclic rate of 3200 rounds per minute without requiring much more space than a standard machine gun.

The MG 81Z found itself used in some unique installations in the Luftwaffe. Some of the more known ones is a pair of MG 81Z's installed in the hollow tail cone of the Dornier Do 217. Designated R19 (R for Rüstsätze) for the factory-designed field kit, it allows the pilot of the 217 to shoot at pursuers with a hail of bullets.

Another application was the Gießkanne (meaning "watering can"), an externally mounted pod with three sets of guns and ammo meant to be attached to a Junkers Ju 88 and used to strafe ground targets.

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