There are three sets of weapons in the 2008 third-person shooter game Army of Two: Primary, secondary, and special.

1. Primary: Most commonly used guns
2. Secondary: Back-up guns, attracts less attention from enemies
3. Special: High-powered weapons with limited ammo

Weapons are unlocked after completing objectives and sub-objectives in single player or co-op mode. All the weapons must be purchased. Players can collect items to receive bonus cash. All weapons are customizable.

1. Primary Weapons:
   1. Machine Guns
      1. M249 Saw
      2. PKM
      3. M134
   2. Assault Rifles
      1. S-System
      2. HK 36
      3. AK 47
      4. AUG
      5. FELIN-2C
2. Secondary Weapons:
   1. Pistols
      1. SOCOM MK.23
      2. Desert Eagle
   2. Shotguns
      1. M3 Super 90
      2. FSPS-12
      3. DAO-X
   3. Submachine Guns
      1. MP7
      2. P90
3. Special Weapons:
   1. Sniper Rifles
      1. M14
      2. MSG-90
      3. DSR-1
      4. SVD Dragunov
      5. M107
      6. Kitten Gun
   2. Grenade Launchers
      1. MGL MK-X
   3. Rocket Launchers
      1. RPG-7 V1
      2. FIM92 Stinger