The item ID for Prawn Suit Torpedo Arm in Subnautica is:
exosuittorpedoarmmodule
A standard payload delivery system adapted to fire torpedoes.
The spawn code for this item is:
spawn exosuittorpedoarmmodule
The item command will add this item to your character's inventory. The item command for Prawn Suit Torpedo Arm is:
item exosuittorpedoarmmodule
To unlock this item, use the following command:
unlock exosuittorpedoarmmodule
If you wish to lock this blueprint, after having unlocked it, use the following command:
lock exosuittorpedoarmmodule