Now this could be a nice rule: BA equipment can only be externally mounted on Mechs. Any hits to the body location where the equipment is mounted will destroy the external equipment.
Or use the same rules as the Exposed Weapon Linkage Quirk, allowing it to be destroyed on a separate 'crit' roll when that same location is hit. (Basically, a roll of 2D6 is made if the section is hit, on a 10+ the item is broken as if it was an internal crit).
Interesting idea. Maybe add an upper limit of BA items (per location?), just to avoid someone replacing the ML of a Savannah Master with 5 BA SRM6(OS)s, or with 28 Light TAGs to illuminate a whole map.
My main concern with BA scale ECM suites on 'mechs is that you would really need more antennas to get full coverage.
Both good considerations. On those ideas, I propose the following
For the first, consider Mod Armor as the path and a specific weight limit of items that all round up to the nearest half ton each. They can also be attached "ad hoc" such that they can put on lower tech equipment far more easily than would installing an optimized suite. Such would be subject to the Quirk mentioned above.
For the second, it operates on that facing. I.E. BA ECM on the Right Arm won't interfere on Artemis hitting from attacks that use Left Side or Rear chart. Torso only operates from attacks that line up with the immediately front hex (or Rear if so mounted). NARC Homing Beacons are only affected if they are on the next location attached, i.e. Right Arm BAECM only affects NARCs that hit the Right Arm, Right Torso, and Right Leg, while Homing Beacons on the the CT, Head, or Left side won't be interferred with unless the shots use the Right Side
