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)

One comment

  • While the Mk.45 Mod.4 is great, it’s a lousy “Anti-Swarming Gun”, with a dismal ~20rpm and lethargic traverse rate of ~30*/sec and ~6 seconds to make an ~180* traverse from port to starboard. Whereas the Mk.110 Mod.3 is able to traverse at ~57*/sec or ~3.158 seconds to make the same port to starboard flip…

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