Atomic Heart

You'll have to wait until you've unlocked at least 5 blueprints to complete this achievement. Once you have the blueprints, interact with an upgrade station and ensure you have enough materials to create each blueprint at least once.

The beauty of Atomic Heart is that you can dismantle any found/created weapons for 100% of their materials. So you could craft a weapon, dismantle it and then use those materials to then make the next weapon.

At the moment you'll need to do all 5 in one sitting as the achievement tracking resets back to 0% when you close down your game.

Pretty simple, just create 5 types of weapons.

A way to speed this achievement up once you have the needed blueprints is to save your game in a saferoom with a crafting machine. disassemble all your weapons, and create new ones and then re-load your previous save. (also seems to work for Chemist, and Lord of War)

Not sure if it's found later in the game, but I have yet to find a blueprint for the shotgun, so If you aren't going to exploit save/load leave the shotgun alone unless your fine with potentially losing it for good.