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In Fallout New Vegas I have a "varmint rifle" and I purchased a "varmint rifle night scope" from Chet in Goodsprings.

How can I put the scope on the rifle?

My first thought was that I should simply go into the Pip Boy and equip the scope, but the option to do that is greyed out.

I tried doing that with the rifle equipped and without.

I also tried activating a workbench, but there was no recipe to modify the rifle.

My character has a "repair" skill of a little over 50.

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up vote 7 down vote accepted

You have to select the weapon, and then hit the weapon mod key/button:

To attach a weapon mod you must have both the weapon it is intended for and the mod in your inventory. Highlight the weapon you want to mod within the items section of your Pip-Boy, then select the modding menu via the button as indicated in the top right of the info panel.

Then you'll switch to a list of the available compatible weapon mods for that weapon, and you can pick one to attach.

(As a side note, if you want a better Varmint Rifle, you may want to go looking for Ratslayer - it is a stronger variant that has all the mods already equipped, but with better stats. Getting to it can be tricky, though.)

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If you are paying it on xbox 360 go into your pip boy and look for the "mod" option. If Certain weapon is highlighted say the 9mm it should have that available with the push of the designated button. That doesn't mean you have an availble mod, it just signifies that mods for that particular item so just a word to the wise, don't get upset when it lights up and you go in to it to find it empty.

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