Jury Rigger Achievement
Repair 30 items.
You should get this achievement over the course of the game simply by looting bodies and repairing like items. Any area with a faction (minor or major) will have lots of potential enemies with like armor and weapons. Kill and loot them and you'll have a good amount of items to repair. Also don't forget the Jury Rigging (Repair 90) perk which makes this achievement trivially easy to get.