Weapon Modification Ideas (keep in mind I haven't played the game that long yet)

- For the combat knife you should be able to customize the handle, texture of the handle, length of the blade (short, medium, long), metal of the blade and the type of blade such as bowie, tanto, karambit, dagger, tri-dagger, kukri, cleaver, shiv, scalpel and many more. Also you could add a gut hook mod which could have and extra chance to cripple a limb or do extra bleeding damage. Also one final note, each blade type should have there pros and cons like the bowie swings slower but does more damage.

- For the double barrel shotgun allow us to be crazy and have up to four barrels or a single barrel.

- For brass knuckles add the traditional spikes, I for one like the option that has the blades sticking out on the side but for more traditional guys add an option for just spikes. Also let us pick the metal or colour for the knuckles.

- I think you should be able to turn the 10mm pistol into a revolver. Also it would be cool if you could turn it into a small rifle of sort if you could add on stocks and barrels of different lengths and add a scope.

- This is probably a stupid idea, like really stupid but it would be nice if you could change the colour of the laser on laser based weapons, maybe by adding a gem of that colour or something along those lines.

- Maybe you could add dual wielding, if anything you could just copy the mechanics from skyrim and allow you to dual wield smaller melee weapons but dual wield pistols are cool too .

- Just some extra mod ideas. Laser sight (more hipfire accuracy), Grip (less recoil), Burst option (add a burst fire onto weapons), Rapid fire (fires faster)

Those are my ideas, If they are any good I hope you can incorporate them some how. Keep up the good work, Fallout 4 is amazing!

(ps: if anyone thinks my ideas my ideas are too FPS-ee just remember that changing a few weapon mods wont turn the game into Call of duty)