How do I make a simple Raycast gun?

[GFXBIT]

I have zero nowladge about creating raycast gun.
Mind showing me where I can find a resource to make one?

[ItsPlasmaRBLX (Brer Rabbit)]

How to make a raycasting gun

My friend hired me to script a gun and I’ll be definitely using this. However, this is only single shot, is there a way to make it automatic?