In this guide, you will find out how to Find & Equip Weapon Blueprints in COD Modern Warfare 2. You just have to follow the simple steps below to do so.
The first thing you will need to do is boot up your game and go to weapons. After that, select Multiplayer Loadout, then go to custom loadout and you will get the blueprint of the gun in the bottom left box of the gun. The number of blueprints is written next to the armory in the gun box.