I am so confused right now. I have the custom missile with the real one inside, scaled to be invisible. All parts of the custom one are zero drag and weight, and the real one has slightly higher weight for realism. All of the custom missile parts aren't connected to the plane's main body, all connections on the custom one ultimately are connected to the real one. The real one is connected to a detacher because that's what the tutorials said.

When I shoot the missile IT DOESN'T MOVE!
I see the rocket trail and I hear the shooting noise, but I see neither the custom nor real missile detaching from the plane and advancing to the target.