The LPO-50 Flamethrower is a weapon in Far Cry 2. It becomes available after the third convoy mission in Act 1 or at the beginning of Act 2 and can be purchased for 20 diamonds. No enemies will ever wield this weapon. You can, however, obtain a used LPO-50 as part of the tutorial mission arsenal if you wake up with either Kankares at the Slaughter House or Queipo at the Cock arena after escaping Pala.