Mk 38 25mm Machine Gun System [M242 Bushmaster] • Training Exercises

The MK 38 (M242 Bushmaster) is a 25 mm (25×137mm) chain-driven machine gun system (MGS) installed for ship self-defense. A derivative of the M242 system, the Mk 38 consists of the M242 chain gun and the Mk 88 Mod 0 machine gun mount. The MK 38 MOD 0 25 mm MGS replaced the MK 16 20 mm gun system and was then upgraded to a MK 38 MOD 1 MGS. Designed primarily as a close-range defensive measure, it provides protection against patrol boats, floating mines, and various shore-based targets.

It is an externally powered, chain-driven, single-barrel weapon which may be fired in semi-automatic, burst, or automatic modes. It is fed by a metallic link belt and has dual-feed capability. The term “chain gun” derives from the use of a roller chain that drives the bolt back and forth. The standard rate of fire is 200 rounds per minute. The weapon has an effective range of 3,000 metres (9,800 ft), depending on the type of ammunition used.

Credits: Video by Juanenrique Owings, Patrick Kelley, Tim Comerford, Daniel Gay | United States Department of Defense

Thumbnail Credit: U.S. Navy photo by Corey Hensley

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Author: rafael.nieves

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