Short version, Item IDs are how the game refers to things internally. They tend to be simplified compared to the actual item names you see in your inventory, because obviously no programmer is going to type out "Dark King Grutmore's Edge of Annihilation" every time -- that ways lies madness.

So if you want more copies of your favorite gun, and doing it legit is not working for whatever reason, the console can save you a lot of hassle if you know how to use it.

We're focusing on 2 console commands here:

"helpitem <item name>"
&
"additem <ID> <number>"

"helpitem" will search the items database, and briefly show the IDs of anything that matches the <item name> string. I recommend a notepad or being a quickdraw on the screenshot button, but for the sake of all interested parties, I will note down as many IDs as I can in the sections below. Then it's just a matter of plugging in that ID in the "additem" command along with how many copies you want.

Needless to say, you can absolutely destroy any semblance of balance the game previously had using this method, so I suggest saving this for after you've already plateau'd on power scaling and just wanna check out the stuff you've missed or finish kitting out your garage.

Entries will generally be in the following format:

FactionName<Gun Number>_<Variant Number>
Gun Number mainly comes up with factions that have multiple weapons specific to them, like militaries.

e.g. the strongest Family Matta gun is the Fratricide -> GunMatta01_08

Not every weapon series goes all the way to class 10, or even class 9 in the case of smaller factions like Crime Syndicates. Missiles in particular are only available in classes 1,3,5,7, and 9.
Special weapons may not have a series at all.

Important Note: This isn't an exhaustive list. I do not have infinite time on my hands, so feel free to mention any you've confirmed in the comments.

Webeater Vulcanite Series: -> Anti-Shield Weapons
GunCiv02_01 -> Webeater
GunCiv02_02 -> Adv. Webeater
GunCiv02_03 -> Ult. Webeater (Class 9)



Absolutionist Photonic Repeater series:
GunAbsol01_01 -> The Knife Mk 1 (Class 1)
02 -> Mk 2
03 -> Mk 3
04 -> Mk 4
05 -> Mk 5
06 -> Mk 6
07 -> Mk 7
08 -> The Sword (Class 8)


Brightsun Muonic Rifle Series:
GunSun01_09 -> Doomsdawn (Class 9)


Nodeghosts Muonic Rifle Series:
GunNode01_01 -> Whisperer Mk 1
02 -> Mk 2
03 -> Mk 3
04 -> Mk 4
05 -> Mk 5
06 -> Rumor Mk 1
07 -> Mk 2
08 -> Mk 3
09 -> Mk 4

Nodeghosts Vulcanite Series: -> (Anti-Shield Weapons)
GunNode02_01 -> Slander (Class 5)
02 -> Perjury (Class 8)




Washer Photonic Repeater Series:
GunWash01_01 -> Love 0
03 -> 1 (no, that's not a typo, they skipped over 02)
04 -> 2
05 -> 3
06 -> 4
07 -> Lust 1
08 -> 2
09 -> 3 (Class 9)


Family Matta Bosonic Blaster Series:
01 -> Mothersmilk Mk 1
02 -> Mk 2
03 -> Mk 3
04 -> Mk 4
05 -> Tiebreaker Mk 1
06 -> Mk 2
07 -> Mk 3
08 -> Fratricide (Class 8)

Sons of the Children Temporal Cannon Series:
GunChild01_09 -> Salavame Type E (Rank 9) (Negotiation Bonus)
10 -> Catrin Type Z (Rank 10) (Negotiation Bonus)

The Choir Bosonic Blaster Series:
GunChoir01_08 - Baratone D (Class 8)


Mining Tool Series
GunRailGun01 -> Mining Beam
02 -> Vyon Beam
03 -> Geoslicer
04 -> Caius Beam



Imbo Weapons -> 0 energy drain guns, comes from Imbo the gun merchant. Shows at stations during storms (I think)?
GunGhul_01 -> Fantasin (Class 4)
02 -> Myarin (Class 4)
03 -> Palasin (Class 7)
04 -> Ghardin (Class 7)
05 -> Hyprin (Class 10)
06 -> Abysin (Class 10)





Tri-Cannon Series
NPCOnly_LorneCannon1 -> Tri-Cannon 1
2 -> 2
3- > 3 (Class 9)

Rustgate Series (Heavy Charge Rate bonus)
GunBlackFleet01_01 -> Rustgate A
03 -> Rustgate B
05 -> Rustgate X (Class 10)

Rustlance Series (Heavy Charge Rate bonus)
GunBlackFleet02_01 -> Rustlance A
03 -> Rustlance B
05 -> Rustlance X (Class 10)

Sonslinger
Gun_Kardoz -> Sonslinger (Class 10)

Speaker Cannon
GunVld02_10 -> Speaker Cannon (Class 10)



Ordinance Titan
Gun_ShapebinderUnique -> Arcane Artillery (Class 9) (Missile bonuses)

Rumeerin
Gun_RumeerinUnique -> Piquet's Requiem (Class 1) (Fits any slot, hits like a Class 10)

???
Gun_ArgonAvenger -> Argon's Avenger (Class 10)

Ticker
Gun_TickerUnique -> #broadcaster_0 (Class 10) (Heavy Charge Rate bonus)

Obscurite
Gun_ObscuriteUnique -> Hardlance (Class 8) (Scan Cost bonus) (Hits like a Class 9)

Harvester:
Gun_HarvesterUnique -> Cornucopia (Class 10) (Many passive bonuses)

General Notes: Add "_Ammo" to entries to specify ammo instead of the launcher


Shield-Piercing Missiles
Missile01_01 -> Bonesunder Launcher
02 -> Shipsunder
03 -> Citysunder
04 -> Moonsunder
05 -> Starsunder

Rapid-Fire Missiles
Missile02_01 -> Rapidfire Launcher
02 -> Chaingun
03 -> Marathon
04 -> Nanosecond
05 -> Recordbreaker

Dumbfire Missiles
Missile03_01 -> Academic Launcher
02 -> Instructor
03 -> Quizmaster
04 -> Savant
05 -> Genius

Seeker Missiles
Missile04_01 -> Seeker Launcher
02 -> Fireseeker
03 -> Greaterseeker
04 -> Starseeker
05 -> Deathseeker

Standard Plating
ShipArmor01_01 -> Extra Hull Plating
02 -> Heavy
03 -> Huge
04 -> Advanced
05 -> Super
06 -> Advanced Heavy
07 -> Hyperplating
08 -> Reflective Hyperplating
09 -> Advanced Hyperplating
10 -> Warpskin (Boss-exclusive)

Regenerative Plating
ShipArmorSpecial01 -> Coral Weave (Extra Hull plating + 5/s Hull Regen)
02 -> Reactive Casing (Huge Hull plating + 5/s Hull Regen)
03 -> Timebourne Cuirass (Super Hull plating + Advanced Heavy Thruster Drain + 10/s Hull Regen)




ShipEngineKit01_01 -> Accelerant Software (Acceleration +25%)
02 -> Cruiser Harddrive (Cruise Start-up Speed +25%)
03 -> Engine Suite (Acceleration/Cruise Start-up Speed +20%)
04 -> Boost Mechanisms (Cruise Start-up Speed +50%, Abyssdrive Shut-off Range -20%)

ShipEngineKit01_05 -> Highengine Algorithmics (Cruise Start-up Speed +50%, Abyssdrive Shut-off Range -20%)
06 -> Mechanized Superkit (Acceleration/Cruise Start-up Speed +40%, Abyssdrive Shut-off Range -20%)
07 -> Blackmarket Overclocker (Acceleration + 70%, Abyssdrive Shut-off Range -35%)
08 -> CODENAME: Zoooooom! (Cruise Start-up Speed +70%, Abyssdrive Shut-off Range -35%)
09 -> Temporal Accelerator (Acceleration/Cruise Start-up Speed +60%, Abyssdrive Shut-off Range -35%)



ShipEngineKit04_01 -> Drive Charger (Acceleration/Cruise Start-up Speed -50%, Abyssdrive Shut-off Range -50%)
ShipEngineKit04_02 -> Void Skimmer (Acceleration/Cruise Start-up Speed -30%, Abyssdrive Shut-off Range -50%)
ShipEngineKit04_03 -> Abyssal Edge (Acceleration/Cruise Start-up Speed -20%, Abyssdrive Shut-off Range -50%)

Thrusters

ShipThruster01_01 -> Thruster
02 -> Large Thruster
03 -> Advanced Thruster
04 -> Jumpthruster
05 -> Spatial Displacer (Best general-use Thruster)
06 -> Lapse Thruster (Low drain but low regen, good for endurance)
07 -> Impulser (high drain and high regen, good for short bursts)
08 -> Dodge Thruster (very high boost drain, very low dodge drain)
09 -> Marathon Thruster (very high dodge drain, very low boost drain)
10 -> Spatial Displacer (again?)

Scanners

ShipScanner01_01 -> Advanced Scanner (Long Range 5 km, Cargo 4 km, Hailing 5 km, Basic Hazards)
ShipScanner01_02 -> High Scanner (LR 6.5 km, Cargo 4.5 km, Hail 5.5 km, + Advanced Hazards)
ShipScanner01_03 -> Deep Scanner (LR 7.5 km, Cargo 5 km, Hail 6 km, + Advanced Hazards)
ShipScanner01_04 -> Advanced Deep Scanner (LR 8.5 km, Cargo 7.5 km, Hailing 8 km, + Hostile Entities)
ShipScanner01_05 -> Underspatial Analyzer (Boss Exclusive) (10 km range for all, + Hidden Secrets)

Shields

Simulation Shields
Shield01Sim -> Simulation Shield (weak shield for testing purposes)
Shield01_SimEnemy -> Mean Shield (non-regenerating shield for testing purposes)

Lorne Shields (Campaign-Exclusive)
ShieldLorne_01 -> Desperate Shield 1 (Class 3)
02 -> 2 (Class 5)
03 -> 3 (Class 8)

Underspatial Shields -> Salvage chance bonus, neutral to all damage types
Shield04_01 -> Delusion Shield (Class 8)
02 -> Trickster Shield (Class 9)
03 -> Peerless Shield (Class 10)

Cloaking Devices

ShipCloak01_01 -> Cloaking Device (Only works on Hazards)
02 -> Astian Cloaking Device (Works on ^ & small ships)
03 -> Obscurite Weave (Boss exclusive) (Works on ^ & big ships)

FriendDrive Augment

ShipFriendDrive01_01 -> Frienddrive Optimizer (+10 seconds duration)
ShipFriendDrive01_02 -> Relationship Calculator (+15 seconds)
ShipFriendDrive01_03 -> Lovereacher (+22 seconds)

Shield Caches

Cache03_03 -> Tesseraction Batteries (Boss Exclusive, Capacity/Restore Rate x2)

Repair Webbing Systems

Webbing03_03 Extraspatial Microtubing (Boss Exclusive?, Capacity/Restore Rate x2)

HeavyExploder_01 -> Sunspot

HeavyRailgun_01 -> Arc Cannon



Dynamos

HeavyDynamo1_1 -> Cascade Dynamo
HeavyDynamo2_1 -> Ripper Dynamo

Commodity_Water -> Water
Commodity_Saffron -> Saffron
Commodity_Firearms -> Firearms