Why point the whole plane at the target. Why not moveable forward guns?

[Flanker35M]

S!

I can tell you Buzzsaw that none of the guns in jets move except the firing mechanism and barrels. Making a movable gun with that kind of recoil would be just too heavy and unreliable. What you referred to was propably the "auto trigger" that works as you described, the gun fires when the target is within a cone where bullets can hit. Even the guns have a range of over 2km the firing distances are still relatively short. And after all if you are down to guns only then something has gone terribly wrong.

But as said the gun systems themselves do not move on jets, on helicopters yes.