So when you play the game Evil within you get to certain ares that only has these guys like in the one basemant and the asylum well I found out that one of the easiest way to kill them is shoot a flash bolt near them it'll make them visible and stun that way you don't have to spray and pray and waste precious ammo just to kill one or do it old fashion and use environment to know where it is

And the game you're taking about is?

I'm guessing Evil Within. But this is nowhere near to being the right forum (EW has it's own) If it's not EW, then you do need to mention the game you're taking about.