Tag Archives: 57mm MK 110

Ever Seen the Magazine of a MK 110?

I thought this shot was interesting, as it shows something I personally have never seen before: the below-deck stowage of rounds aboard USS Charleston (LCS 18) for the ship’s No. 1 mount, its Bofors Mark 3/BAE Mk 110 57 mm gun. Capable of a whopping 220 rounds per minute until its 120 round automatic loader drum is empty, GMs would likely then have to refill said drum from this magazine.

PHILIPPINE SEA (Aug. 20, 2021) Mineman 2nd Class Hunter Auslander, left, from Fort Lauderdale, Fla., and Mineman 1st Class Danielle Epperson stow 57mm rounds aboard the Independence-variant littoral combat ship USS Charleston (LCS 18), Aug. 20, 2021. Charleston, part of Destroyer Squadron (DESRON) 7, is on a rotational deployment, operating in the U.S. 7th fleet area of operations to enhance interoperability with partners and serve as a ready-response force in support of a free and open Indo-Pacific region. (U.S. Navy photo by Mass Communication Specialist 2nd Class Adam Butler) 210820-N-WU807-1040

With a range of 9.1 nautical miles, the MK 110 gun is installed aboard both classes of LCS and the Coast Guard’s large National Security Cutters, taking the place of the 75mm OTO Melera gun in the fleet. It is also set to be used on the Constellation-class frigates and the USCG’s offshore patrol cutters.

Personally, I’d like to see all of the above carry a MK 45/62 5-incher, firing beautiful 70-pound shells, but that’s just me and SECNAV never returns my phone calls. 

USS Delbert D. Black (DDG-119) conducted the first live-fire of her Mk. 45 5in 62 Mod 4 gun, Feb 2020. (U.S. Navy photo)

The More Things Change, Forward Mount Edition

The guns may have shrunk, along with the ships, but the task remains.

Bluejackets standing atop turret No. 1 to clean the 12-inch/50 caliber Mark 7 guns in turret No. 2 aboard the brand new dreadnought battleship USS Wyoming (BB-32), circa 1913, likely during winter fleet gunnery practice off Puerto Rico. Wyoming carried six such Mark 9 twin turrets on her centerline and, as with coaling, was surely a massive undertaking to maintain her extensive fire-belching batteries.

Official caption: Sailors assigned to the Freedom-variant littoral combat ship USS Sioux City (LCS 11), and the “Sea Knights” of Helicopter Sea Combat Squadron (HSC) 22, Detachment 3, conduct maintenance on the 57mm MK 110 gun while the ship is in port Ponce, Puerto Rico for a brief stop for fuel and provisions, May 12, 2021. Sioux City is deployed to the U.S. 4th Fleet area of operations to support Joint Interagency Task Force South’s mission, which includes counter-illicit drug trafficking missions in the Caribbean and Eastern Pacific. (U.S. Navy photo by Mass Communication Specialist 2nd Class Marianne Guemo/Released)