WHat kind of question is that RAY GUN....geez untill round 12 flame thrower is good but after that it prevents from seeing the rest zombies and it doesn't kill the fast enough...a panzerscreck would be more efficient!!!!
The Raygun is way better, the flamethrower takes too long to cool down and doesnt kill zombies fast enough but if you have insta-kill the flamethrower is awesome. The raygun is always 1 hit kill and doesnt take long to reload, can be used in last stand and is fast shooting
Ray gun no doubt its one shot kill and it shoots straight through enemies, which is useful if there is a line of zombies. The flamethrower blinds your line of sight and lights up the screen. You know whats worse then zombies running after you? Zombies on fire running after you! It doesnt exactly put 'em down as easily so Im going to have to vote Ray Gun
It really depends on the situation. Ray gun is my choice for its one hit kill capabilities in regular situations. However, with the insta-kill on, the flamethrower easily overpowers any weapon.