Reach the score indicated whilst controlling the relevant vehicle type and you'll unlock the upgrade.
Anti-Air
Upgrade Slot Score Needed 20MM Cannon Primary Weapon Provided by default Heatseekers Secondary Weapon Provided by default IR Smoke Countermeasure Provided by default Zoom Optics Vehicle Optics Provided by default Maintenance Upgrades Provided by default Thermal Camo Upgrades 2,000 IRNV Optics Vehicle Optics 3,000 Autoloader Upgrades 4,000 Passive Radar Secondary Weapon 5,000 Proximity Scan Upgrades 7,000 Smokescreen Countermeasure 8,000 30MM Cannon Primary Weapon 9,000 Thermal Optics Vehicle Optics 10,000 Reactive Armor Upgrades 11,000 Fire Extinguisher Countermeasure 12,000 Zuni Rockets Secondary Weapon 13,000 Air Radar Upgrades 14,000 Active Radar Secondary Weapon 15,000 Active Protection Countermeasure 16,000Attack Jet
Upgrade Slot Score Needed 30MM GAU Cannon Primary Weapon Provided by default Laser Guided Secondary Weapon Provided by default IR Flares Countermeasure Provided by default Gyro Stabilizer Upgrade Provided by default Stealth Coating Upgrade 3,000 Heatseekers Secondary Weapon 6,000 Proximity Scan Upgrade 9,000 Hydra Rockets Secondary Weapon 12,000 ECM Jammer Countermeasure 15,000 Fire Extinguisher Countermeasure 18,000 TV-Guided Missile Secondary Weapon 21,000 Belt Feeder Upgrade 24,000 JDAM Bomb Secondary Weapon 27,000Attack Helicopter
Upgrade Slot Score Needed Hydra Rockets Primary Weapon Provided by default Heatseekers Secondary Weapon Provided by default IR Flares Countermeasure Provided by default Gyro Stabilizer Upgrades Provided by default Gunner Zoom Gunner Optics Provided by default Stealth Coating Upgrades 4,000 Gunner Prox. Scan Primary Weapon 7,000 Fire Extinguisher Countermeasure 11,000 Gunner IRNV Gunner Optics 14,000 Zuni Rockets Primary Weapon 17,000 ECM Jammer Countermeasure 20,000 Laser Guided Secondary Weapon 23,000 Air Radar Upgrades 26,000 Gunner Thermal Gunner Optics 29,000 TOW Missile Secondary Weapon 32,000 TV-Guided Missile Secondary Weapon 35,000 Smart Rockets Primary Weapon 38,000Battle Tanks
Upgrade Slot Score Needed AP Shell Primary Weapon Provided by default Coaxial LMG Secondary Weapon Provided by default IR Smoke Countermeasures Provided by default Zoom Optics Vehicle Optics Provided by default Maintenance Upgrades Provided by default Gunner Zoom Gunner Optics Provided by default Gunner Belt Feed Gunner Upgrades Provided by default Thermal Camo Upgrades 7,000 Guided Shell Secondary Weapon 12,000 Gunner Prox. Scan Gunner Upgrades 17,000 IRNV Optics Vehicle Optics 21,000 HE Shell Primary Weapons 25,000 Smokescreen Countermeasures 29,000 Autoloader Upgrades 32,000 Gunner IRNV Gunner Optics 36,000 Coaxial HMG Secondary Weapon 39,000 Thermal Optics Vehicle Optics 42,000 Canister Shell Secondary Weapon 46,000 Fire Extinguisher Countermeasures 49,000 Gunner SOFLAM Gunner Upgrades 52,000 Reactive Armor Upgrades 55,000 Staff Shell Secondary Weapon 58,000 Gunner Thermal Gunner Optics 61,000 Sabot Shell Primary Weapon 64,000 Gunner Incendiary Gunner Upgrades 67,000 Active Protection Countermeasures 69,000Fast Attack Craft
Upgrade Slot Score Needed 20MM Cannon Primary Weapon Provided by default TOW Missile Secondary Weapon Provided by default IR Smoke Countermeasure Provided by default Zoom Optics Vehicle Optics Provided by default Maintenance Upgrades Provided by default Thermal Camo Upgrades 2,000 Passive Radar Secondary Weapon 3,000 Smokescreen Countermeasure 4,000 Proximity Scan Upgrades 5,000 IRNV Optics Vehicle Optics 6,000 30MM Cannon Primary Weapon 7,000 Belt Feeder Upgrades 8,000 Laser Guided Secondary Weapon 9,000 Air Radar Upgrades 10,000 Zuni Rockets Secondary Weapon 11,000 Fire Extinguisher Countermeasure 12,000 Burst Cannon Primary Weapon 13,000 Thermal Optics Vehicle Optics 14,000 TV-Guided Missile Secondary Weapon 15,000 Active Protection Countermeasure 16,000Infantry
Upgrade Slot Score Needed 25MM HE Shell Primary Weapon Provided by default Coaxial LMG Secondary Weapon Provided by default IR Smoke Countermeasures Provided by default Zoom Optics Vehicle Optics Provided by default Maintenance Upgrades Provided by default Zoom Optics Gunner Optics Provided by default Gunner Belt Feeder Gunner Upgrade Provided by default Thermal Camo Upgrades 4,000 TOW Missile Secondary Weapon 6,000 Gunner Prox. Scan Gunner Upgrade 9,000 IRNV Optics Vehicle Optics 11,000 APFSOS-T Shell Primary Weapon 13,000 Smokescreen Countermeasures 15,000 Gunner IRNV Gunner Optics 17,000 Autoloader Upgrades 19,000 Thermal Optics Vehicle Optics 21,000 Gunner SOFLAM Gunner Upgrade 23,000 Canister Shell Primary Weapon 25,000 Fire Extinguisher Countermeasures 26,000 Reactive Armor Upgrades 28,000 Gunner Thermal Gunner Optics 30,000 Zuni Rockets Secondary Weapon 31,000 Gunner Incendiary Gunner Upgrade 33,000 Active Protection Countermeasures 35,000Stealth Helicopter
Upgrade Slot Score Needed 7.62 Miniguns Primary Weapon Provided by default IR Flares Countermeasure Provided by default Gyro Stabilizers Upgrades Provided by default Stealth Coating Upgrades 3,000 Heatseekers Secondary Weapon 6,000 Fire Extinguisher Countermeasure 9,000 25MM Cannons Primary Weapon 12,000 Belt Feeder Upgrades 15,000 Proximity Scan Upgrades 18,000 ECM Jammer Countermeasure 21,000 Air Radar Upgrades 24,000 Laser Guided Secondary Weapon 28,000Stealth Jet
Upgrade Slot Score Needed 20MM Cannon Primary Weapon Provided by default Heatseekers Secondary Weapon Provided by default IR Flares Countermeasure Provided by default Gyro Stabilizer Upgrade Provided by default Belt Feeder Upgrade 3,000 Passive Radar Secondary Weapon 6,000 Proximity Scan Upgrade 9,000 25MM Cannon Primary Weapon 12,000 ECM Jammer Countermeasure 15,000 Laser Guided Secondary Weapon 18,000 Fire Extinguisher Countermeasure 21,000 30MM Cannon Primary Weapon 24,000 Stealth Coating Upgrade 27,000 Active Radar Secondary Weapon 30,000