>>892
こちらはライフルから弾丸(Sphere)が出るスクリプトです。
#pragma strict
var Sphere: GameObject;
function Update () {
if( Input.GetButton("Fire1")) {
var muzzle = transform.Find('Lo_Muzzle');
var bul : GameObject = Instantiate(Sphere,muzzle.position,muzzle.rotation);
var direction = (muzzle.position - transform.position).normalized;
bul.rigidbody.velocity = direction * 50;
}
}
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var bul : GameObject = Instantiate(Sphere,muzzle.position,muzzle.rotation);
この行でエラーが出ているようです。

MissingReferenceException: The object of type 'GameObject' has been destroyed but you are still trying to access it.
Your script should either check if it is null or you should not destroy the object.
UnityEngine.Object.Internal_InstantiateSingle (UnityEngine.Object data, Vector3 pos, Quaternion rot)
UnityEngine.Object.Instantiate (UnityEngine.Object original, Vector3 position, Quaternion rotation)
bullet.Update () (at Assets/bullet.js:11)