Every Mission you complete you'll get an individual Weapon Upgrade specific to each Character (i.e. Graves & Lang)!
You can also use any unlocked Weapon Upgrades in any unlocked Mission at any difficulty setting under the Replay Mission Menu!
|How to unlock||Unlockable|
|Complete 1st Mission||Gun Camera for the 7.62mm Sniper Rifle (for Graves)|
|Complete 1st Mission||HEAT Rocket Launcher (for Lang)|
|Complete 2nd Missions||40mm Grenade Launcher Attachment for the LMG 5.56mm (for Lang)|
|Complete 2nd Missions||Shotgun Attachment (for Graves)|
|Complete 3rd Missions||200|
|Complete 3rd Missions||Suppressor for the 7.62mm Sniper Rifle (for Graves)|
|Complete 4th Missions||Flashbangs (for Graves & Lang)|
|Complete 5th Missions||Incendiary Grenade (for Lang)|
|Complete 6th Missions||Proximity Mine (for Graves)|
|Complete 7th Missions||25% increased Rate of Fire for the LMG 5.56mm (for Lang)|
|Complete 8th Missions||Automatic Shotgun (for Graves)|
|Complete 9th Missions||Foregrip for the LMG 5.56mm which increased stability and reduces recoil when used (for Lang)|