I'm going to maintain a centralized list of items which can't be upgraded in game (forgive me if this has been done before). Please post items here and I'll keep this first post up to date.
SPACE GEAR
Impulse:
Dynamic Reroute Impulse Engines. Revert to standard impulse engines, losing the special 'Dynamic Reroute' ability.
Weapons:
Bio-Molecular Warhead Launcher
Piercing Tetryon weapons - from 'Installation 18'. Loses all mods, turns into regular tetryon weapon
Vaadwaur Cluster Torpedo
Wide Angle Voth Transphasic-Chroniton Launcher
GROUND GEAR
Armor:
Chromodynamic Armour
Veteran EVA suits
Shields:
Personal Mobility Shield -- can be slotted, but converts to a standard Personal Shield
Weapons:
Breen Polaron Compression Pistol - from the Breen bridge officer
Hirogen Tetryon Blast Rifle
Kri'stak Blade
Nanopulse Edge Bat'leth
Nelen Exil's Wide Beam Pistol
Polaron Full Auto Rifle [Rch] -- reward from Forging Bonds, full auto with a faster recharge time on the secondary fire
After any upgrade, bonus proc to critical chance are no longer working on most (95%) of maps (item tooltips say bonus exist, but ship stats screen say this console do not add anything to CrtH). If anyone do not believe, please upgrade console and look at ship info screen (equip it and unequip it few times...)
Since bonus to CrtH is main reason to use this console, any upgrade make it useless.
The "Romulan Disruptor Wide Beam Pistol" from the Reman Science Officer Candidate (mission reward from "Cutting the Cord") does not appear to be upgradable.
- - - - I n f e r i o r i t y - C o m p l e x - - - - - - - - - - - - - - - - - - - - - - - - - -
The normal white mark 10 voth transphasic-chronitons aren't upgradable either, but I rather gather this is intentional. Though I wish it wasn't since it's basically impossible to acquire the other version without spending five hundred dollars.
Comments
After any upgrade, bonus proc to critical chance are no longer working on most (95%) of maps (item tooltips say bonus exist, but ship stats screen say this console do not add anything to CrtH). If anyone do not believe, please upgrade console and look at ship info screen (equip it and unequip it few times...)
Since bonus to CrtH is main reason to use this console, any upgrade make it useless.
Anyway, it is old bug, reported many times...