To turn weapons and junk into crafting sources, you’ll need to scrap them. You can craft weapon mods from both weapon parts and random wasteland junk. You can also go directly to: Weapons || Armor The Basics If you want to know how to modify your weapons and armor, keep reading.
If you want more info on effectively scrapping materials, click here. If you want to know how to successfully build your own settlement, click here. This allows you to do anything from constructing housing and defense structures for your own settlements, to modifying and repairing your own weapons and armor. One of the big changes in Fallout 4 is its deep and extensive crafting/modification system.