[kackbip]

package  {
   import flash.display.MovieClip;
   import flash.events.MouseEvent;
 
   public class GUNS extends MovieClip {
 
      public function GUNS() 
      {
         this.addEventListener(Event.ADDED_TO_STAGE, init);
      }
 
      public function init():void{
         this.addEventListener(MouseEvent.MOUSE_DOWN, mDown);
         this.addEventListener(MouseEvent.MOUSE_UP, mUp);
      }
      public function mDown(e:MouseEvent):void
        {
           this.startDrag(true);
        }
      public function mUp(e:MouseEvent):void
        {
           this.stopDrag();
        }
   }
 
}

Пока объект не стоит на сцене у него stage=null