Alternatively could be called "Phalanx Phalanx"... geddit?
Simple weapon swap. Removed the SRMs and the King David, replaced them with the RISC APDS and Heavy Recoilless Rifle, these use the mass quite appropriately.
I did consider the MagShot but that left so much weight over i didn't know what to do with it, i didn't want to increase the armor or modify mobility as i think this should be doable as a field-refit.
Currently, the only canon design with the BA APDS is the Aegis (basically Angerona variant), but that one does nothing but carry the APDS. Figured the Phalanx would make an excellent platform for one, on the account of having a lot of weapons and being Omni-capable, so it can pull double-duty as additional missile defense and supporting firepower.
Phalanx Battle Armor (APDS)
Type: Phalanx Battle Armor
Manufacturer: Unknown
Primary Factory: Unknown
Tech Base: Inner Sphere (Standard)
Chassis Type: Biped
Weight Class: Heavy
Maximum Weight: 1,500 kg
Battle Value: 260
Swarm/Leg Attack/Mechanized/AP: No/No/Yes/No
</p>
Equipment Slots Mass
Chassis: 300 kg
Motive System:
Ground MP: 2 80 kg
Jump MP: 0 0 kg
Manipulators:
Left Arm: Battle Claw 15 kg
Right Arm: Armored Gloves 0 kg
Armor: Stealth (Improved) 5 420 kg
Armor Value: 8 (Trooper)
Slots
Weapons and Equipment Location (Capacity) Mass
RISC Advanced Point Defense System Body 2 350 kg
Recoilless Rifle Right Arm 3 325 kg