Meet the M242 Bushmaster, America's 25mm Chain Guns, weapon fires 200 rounds a minute

2024/01/05 に公開
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Meet the M242 Bushmaster, America's 25mm Chain Guns, weapon fires 200 rounds a minute

The M242 Bushmaster chain gun is a 25 mm (25×137mm) single-barrel chain-driven autocannon. It is used extensively by the U.S. military, such as in the Bradley fighting vehicle, as well as by other NATO members and some other nations in ground combat vehicles and various watercraft. Hughes Helicopters in Culver City, California, was the original designer and manufacturer. As of 2019, Northrop Grumman Innovation Systems produces the gun.

Unlike most automatic firearms, the M242 does not depend on gas or recoil to actuate its firing system. Instead, it uses a 1 hp (0.75 kW) DC motor, positioned in the receiver to drive the chain and dual-feed system. This system uses sprockets and extractor grooves to feed, load, fire, extract, and eject rounds. A system of clutches provides for an alternate sprocket to engage and thus allows the gunner to switch between armor-piercing and high-explosive rounds.

The weapon assembly consists of three parts: the barrel assembly, the feeder assembly, and the receiver assembly. The three-part structure makes it possible for a two-person team to install or remove the system (under ideal conditions) despite its considerable total weight.

The M242 weapon system has both electrical and manual fire control and can be operated electrically or manually. The gunner can choose from three rates of fire:

1.Single Shot Semi-Automatic, in which the gunner can shoot as fast as the trigger can be operated, limited only by the electrical drive speed (it cannot exceed the "High rate" firing speed);

2.Low Rate Fully Automatic, in which the weapon fires 100 rounds a minute, ± 25 rounds; and

3.High Rate Fully Automatic, in which the weapon fires 200 rounds a minute, ± 25 rounds.

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