When you detect a collision, you could set the arrow's RigidBody mode to
To detect collisions on a rigid body, you must first enable the contact monitor property. Then, you can connect your arrow's
The rigid body can only report on collisions with other rigidbodies though. and setting the arrow to MODE_STATIC will make it stay hovering in space, it won't stick to the target if it moves. To correct that, you can add the arrow a child of its target.