I brought a couple of Mods for an Anti-Material Rifle and they have a (Gun Runners Arsenal) label in the Pipboy but i can attach the mods, i did pick up the gun in a location that was added via a Quest Mod that i installed but i'm wondering whether i need a weapon with the same (Gun Runners Arsenal) label on it to equip these mods or if it's because this Quest Mod added an Anti-Material Rifle which is different from the regular one

  • Could you edit in the name and a link to the webpage of the Quest mod you installed? Commented Mar 12, 2013 at 4:50
  • @galacticninja no can do, i dont remember which Mod it is or exactly where i got it from, i know it was from a Nexus Site and i think the Mobile VaultTech Trailer (or close to that), it's not so much a quest mod but considering the amount of work you have to do to unlock the trailer without using the unlock console command i could see it as a quest (unlike the Underground Vault where the Quest was very simple and could be skipped when you enter)
    – Memor-X
    Commented Mar 12, 2013 at 5:13

2 Answers 2


Even though Fallout Wikia states that some GRA mods can be used with non-GRA weapons, I cannot find any mod that actually fits the description. This means that all the GRA weapon mods require GRA weapons.

Edit: I just tested the GRA Assault Carbine Extended Mags mod on the normal version of Assault Carbine and it didn't even come up in the Mods screen.

  • that's about the same response it get with my rifle, the only GRA mods i've used are for the Katana and i ended up buying one with the same GRA label on it
    – Memor-X
    Commented Mar 12, 2013 at 5:17

Actually not all do. There are mods for guns such as varmit rifles and laser rifles and hunting rifles that arent gra weapons. If the weapon has a copy that is (GRA) then you can only put it on the gra copy.

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