I have had cheep strait bars that would bend then I would flip them over again. Conduit is way weaker! Think EMT ambulance.
i think emt would be ok as long as you dont use 1/2 inch....3/4 should be strong enough....i rather see you get mild steel tubing though...you can get it thicker....i never use emt for anything but what it is made for due to it sucking to weld(galvinization and all).....ive bent a whole bunch of emt and can vouch that 3/4 should be plenty strong(depending on the weight your gonna put on it) but id definately recomend using tubing....good luck tell us how it comes out...maybe it would be strong enough....ps handle bars arn't that expensive
Geeze Norman, I did not know that you were versed in crafting zip guns!