In the Doctor Who episodes with Weeping Angels, the Angels turn into statues when they are observed. In "The Time of Angels" and "Flesh and Stone", the Angel statues become deteriorated as the actual Angels die, which means that the state of the Angel's statue is connected to the state of its actual body.
Also in those episodes, the protagonists have weapons with the capability of destroying or at least severely damaging the statues, but they never use their weapons for that purpose, even when it would have been tactically useful to kill or injure a single Angel. This implies that they knew that destroying the statues would be useless or a waste of ammunition.
The Doctor says multiple times that when the Angels are quantum locked they turn into statues and that this is the ultimate defense mechanism. So, is there any explanation for what exactly happens when the Weeping Angels are quantum locked that resolves the apparent contradiction between the statues being the Angels' bodies and that harming the statues would not harm the Angels?