MK 110 Bofors 57 mm | Mk-46 30mm | Mk 45 Mod 4 Naval Gun System In Action

The Bofors 57 mm l/70 naval guns are a series of dual-purpose naval guns designed and produced by the Swedish arms manufacturer AB Bofors (since March 2005 part of BAE Systems AB), designed in 1964 as a revision of the 57 mm lvakan M/50 used on the Halland-class destroyers.

The Mk-46 gun weapon system (GWS) is a Naval derivative of the 30mm gun turret originally designed for the USMC Expeditionary Fighting Vehicle. The Mk-46 GWS is a remotely operated naval gun system that uses a 30mm high velocity cannon, a forward looking infrared sensor, a low light television camera, and a laser rangefinder for shipboard self defense against small, high speed surface targets. The gun can be operated locally at the gun turret or remotely at the Remote Operating Console in the Combat Information Center (San Antonio class LPD) / Mission Control Center (Freedom + Independence class LCS).

The 5-inch/54 caliber (Mk 45) lightweight gun is a modern U.S. naval artillery gun mount consisting of a 127 mm (5 in) L54 Mark 19 gun on the Mark 45 mount.[1] Originally designed and built by United Defense, it is now manufactured by BAE Systems Land & Armaments after the former was acquired.

The latest 5-inch/62 caliber version consists of a longer barrel L62 Mark 36 gun fitted on the same Mark 45 mount. The gun is designed for use against surface warships, anti-aircraft and shore bombardment to support amphibious operations. The gun mount features an automatic loader with a capacity of 20 rounds. These can be fired under full automatic control, taking a little over a minute to exhaust those rounds at maximum fire rate. For sustained use, the gun mount would be occupied by a six-man crew (gun captain, panel operator, and four ammunition loaders) below deck to keep the gun continuously supplied with ammunition.


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