i think i understand what your trying to do, you want to do it the easy way and make a instant bullet instead of a moving bullet. well db enhanced comes with a line of sight command but it only works with static objects and i'm pretty sure the badguys in your game are gonna be moving about and thus will need object collision boxes probably.
i take it your making a 1st person shooter (u need a crosshair) to do this the easy way your gonna need a line of sight object (like a thin plane) to be placed directly at your camera position and face outwards and hidden so no matter which direction your camera is facing the line of sight object is always in the same position infront of the camera and pointing outwards for a far distance. then all you do is detect collision between this los object and any enemies (use a rotating object collision box for this) could work
to live is to suffer, to survive, well, thats to find meaning in the sufferening.....