Gun Nut is an achievement/trophy in Call of Duty: Infinite Warfare. It requires the player to scan 22 out 28 total equippable weapons. The six weapons not required are the NV4, Kendall 44, FHR-40, EBR-800, DMR-1 and Combat Knife.
- F-SpAr Torch (dropped by the R-C8)
- Reaver (inside the Civilian Armory)
- Mauler (inside the Civilian Armory)
- Oni (randomized spawn; either dropped from SDF soldiers or found in the armory abroad the Ares Vallis)
- DCM-8 (additionally to this one, it also spawns in the first armory of the later Operation Burn Water)
- P-LAW (mission item)
- HVR (randomized chance of dropping from the very first two SDF scouts encountered; reload checkpoints until it spawns)
- KBS Longbow (spawns in the first armory)
- Spartan SA3 (spawns in several fixed locations during the C12 encounter)
- Titan (found in the final armory; directly ahead in a broken-off section of a crashed ship. Also spawns in several shipping containers during the assault on the Olympus Mons.)
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