But the weapon you are putting a mod onto has to have a pre existing model with the attachment allready on it to work properly. The item mod itself don`t house the attachment on the model. You could have the sniper rifle silencer fit every weapon in the game as long as you have the silenced part of the modbox checked to the id for the sniper silencer. You only have to select which item mod is used in the modbox to get that paticlular mod. Ohh and you allready can make it to where 1 scope can fit all pistols and 1 silencer can fit all other things. You can add the mods one by one and everything works fine, Just figure out how to do it in reverse to where it still operates accordingly. Each weapon mod has its own unique model and if they can figure out how to reverse and remove a mod from a weapon then it should return to its default model or the model of whatever is still modded onto it. I don`t know why they didn`t bother putting that into the weapon mod system. Open your pipboy select the weapon and click the mods off just like you clicked them on. I do want to be able to unequip my weapon mods though.

It would be alot of work for whoever decided to undertake something like that.

With adding more different types of scopes and accessories you would need to have a huge amount of matching weapon models to match the new addons.

New vegas remove weapon mods