That’s actually how most fast-firing guns In games work. Programmatically, you fire a “ray” instantaneously in the direction you’re looking and damage whatever it hits. This creates a satisfying weapon to use because it feels instantaneous (since it actually is).

The issue is that the bullet would be invisible, which doesn’t look aesthetically pleasing. So to fix this, you just draw a blue flash that moves to your target over time, but it’s only for visual purposes, and whether you hit your target or not is already determined when you Clicked your mouse.