The 57×438mm ammunition is used for the Bofors L/70 naval gun system, on which the Mk-110 is based on. Its family of ammunitions include the high explosive fuzed cartridge, guided cartridges, as well as training rounds.
The 57mm Mk 295 Mod 0 3P-HE Fuzed Cartridge is a pre-fragmented, programmable, proximity-fuzed fixed round for use with the 57mm Mk-110 Mod 0 Naval Gun System. It consists of a pre-fragmented projectile body containing more than 8000 pre-formed tungsten fragments, a 6-mode programmable fuze and PBX explosive, a brass cartridge case containing Low Vulnerability Ammunition (LOVA) propellant, and an electric primer.
The Mk 295 rounds have six operating modes, each programmable by the fire control system to combat all surface, air and shore threats. The modes include:
Gated Proximity (air, anti-jamming)
Gated Proximity with Impact Priority (air, large targets)
Precision Time (surface)
Armor Piercing (surface and shore)
This increases the flexibility and effectiveness of the gun system, which has further reduced the reaction time of the gun and it is possible to choose ammunition mode at the moment of firing, giving it the ability to switch rapidly between surface targets, air targets as well as ground targets.
The Mk 332 HE-4G is a 57mm electrically-primed bolt cartridge designed to function in the Mk-110 Naval Gun System. The fixed cartridge consists of a radio frequency guided projectile, brass cartridge case and energetics qualified for Navy use. The projectile is composed of a guidance section, an advanced divert module with a fuse safe and arm, and a warhead.