Unlock the following upgrades for the specified characters by performing the corresponding tasks. The newly unlocked upgrade can be used in any replayed mission.

WEAPON UPGRADE - HOW TO UNLOCK
7.62mm sniper rifle gun camera (Graves) - Complete the first Mission.
7.62mm Sniper Rifle Suppressor(Graves) - Complete 3 missions.
Automatic shotgun (Graves) - Complete 8 missions.
Flashbangs (Graves and Lang) - Complete 4 missions.
HEAT rocket launcher (Lang) - Complete the first Mission.
Incendiary grenade (Lang) - Complete 5 missions.
LMG 5.56mm 200-round magazine capacity (Lang) - Complete 3 missions.
LMG 5.56mm 25% increased rate of fire (Lang) - Complete 7 missions.
LMG 5.56mm 40mm grenade launcher (Lang) - Complete 2 missions.
LMG 5.56mm Foregrip (Lang) - Complete 9 missions.
Proximity mine (Graves) - Complete 6 missions.
Shotgun attachment (Graves) - Complete 2 missions.