Gun Nut/Fallout 4

Gun Nut is a perk in Fallout 4.

Effects
For each rank taken in the Gun Nut perk tree, the Sole Survivor will gain access to a better tier of gun modifications. Gun Nut can be taken four times, each time granting access to an additional rank of gun modifications (ie, Rank 1 of the perk accesses Rank 1 modifications, Rank 2 of the perk accesses Rank 2 modifications, and so on).