If not – the menu will show you what you need, so you can go out and collect the missing ingredients. If you’ve got the materials, it’ll be done in no time. You choose a weapon, pick the part you want to swap, then pick the mod you want to install.
You can turn a regular pistol into a shotgun or a sniper rifle. Weapon CustomizationWeapons in Fallout 4 can be changed so drastically, you’ll forget what they looked like in the first place. This guide will show you how to customize weapons in Fallout 4, how to craft and use weapon mods in Fallout 4. You can change every part on almost any weapon you own, provided you have the materials and access to a workbench.
Weapon customization is extremely detailed in Fallout 4.