Well I was not there. But while they wrestled for the rifle. The kitchen light also smashing.
This was accepted by defence, prosecution & judge at trial.
I assume you think the silencer made the scratch marks and this was while the silencer was attached to the rifle? Is that so? If so, I think that this would have been virtually impossible, for at least three reasons:
(i). The relevant part of the silencer could not have made those marks.
(ii). The silencer would have had to be flat to the surface of the aga surround.
(iii). No traces of paint were found on the floor beneath the aga surround, yet there are at least two scratch marks, if not three.