The plasma cartridge is a small, green container and is used by all varieties of plasma weapons.
Weapons using this ammunition
- 100 can be found on dead General McGann, inside the Castle tunnels during the quest Old Guns.
- Can be found on dead Gunners carrying plasma weapons
- Sold by various merchants, such as Daisy, KL-E-0, Arturo Rodriguez, Percy, Myrna, the synth requisition officer, Eleanor, Proctor Teagan, Smiling Larry, and Deb.
- Occasionally sold by Ronnie Shaw after completing Old Guns.
- Found on Gunners at higher levels.
- Two cartridges can be found on a counter in the armory of the Prydwen, sitting near a tray with other ammunition. These are the only placed instances of plasma cartridges in the game.
- With the Beta patch 1.4, plasma cartridges can now also be found with the Scrounger perk.
- Unlike previously featured weapons in the Fallout series, plasma weapons in Fallout 4 utilize their own form of ammunition instead of sharing them with laser weapons.