Ship equipments got their zon file (data/Library/ShipParts/guns_radars_01.zon), therefore in theory they should get damage, or they were conceived by devs to do so
I see two possible problems though:
- DMG_Col_ etc. collision models are missing from the GR2 file. I have no idea wether they are required or not for making equipments and guns destructible as they are for main units

but i guess so. We should ask TDW if his GR2 editor at its current state can be able to add those models
- Some equipments, including reflectors, have not their box defined in the zon file.
If someone wants to test it, I can add a box around them to see what is going to happen in game.