This Achievement Requires you to craft 50 weapon mods.
There's actually a super simple way to get this. You can actually use the same mod on the same weapon over and over until this pops.
You do this by selecting the mod (will give an example), crafting the mod, then selecting "No Upgrade", and them modding the weapon the same way again.
For example, I had plans for a Combat Knife, which takes very little resources to craft first of all. I then modded it for "Serrated Blade". Component breakdown:
The Combat Knife Takes: 1 Adhesive, 1 Gear, 2 Rubber, and 3 Steel
The "Serrated Blade" Mod Takes: 1 Adhesive, 1 Fiberglass, and 3 Steel (Requires "Makeshift Warrior 2" Perk Card)So in total, starting from 0 modded weapons this will only take you:
51 Adhesive, 50 Fiberglass, 153 Steel, 1 Gear and 2 Rubber, which is all very obtainable.
Using this method will definitely be the most economical way to do this, without costing you too many materials.Note:
you will need the Plan for this, but it's easy to obtain or you could use a weapon you already have the plans for, there are plenty of "Serrated Blade" capable weapons that are far more common. And obviously, component requirements will vary based on the weapon you use. But it definitely seems melee weapons, specifically bladed, are the way to go.