This is based on the development version 1.97.146039.
Similiar as previously reported for the chemical devices, there are 4 versions of the spectrum device shown in the assets list in the editor, but are not available elsewhere.
When using "Edit Loadout" on a unit in the editor only one spectrum device (hgun_esd_01_F) is available.
Only the above mentioned versions is available in the arsenal after adding all versions va the BIS_fnc_addVirtualWeaponCargo function.
However all of the versions are available via virtual arsenal for example with B_supplyCrate_F + an additional version (hgun_esd_01_dummy_F), which is propably not intended to be listed there.