The ultra-deadly M240A1 is one of the most fearsome and savage weapons in the arsenal of the Colonial Marines. Firing extra-thick sticky napthal fuel from detachable fuel tanks, the M240A1 is able to both set hostiles ablaze and to section off an area with a wall of fire. For extended field operations, users of the M240A1 often find themselves refilling their tanks with whatever flammable material is available, usually from the G-41 fuel tanks. Welding fuel is an alternate choice, readily available though not as effective. Additionally, one can ask the Pyrotechnician to refill your empty fuel tanks. To turn on the pilot light, go to the Weapon Tab and click Toggle Gun Safety or Alt+Click the Flamethrower. There is no default hotkey for activating the incinerator unit, though you can set up one as a Macro.