I would like to mount the BSA holo sight that I have for my 15-22 on my M&P.22 pistol. I was thinking of making a mount that attached to the lower rail and cleared the slide for top mounting, but I got to thinking what if the holo sight was mounted at 90 degrees to the left of the gun in line with the barrel. It would be about the same distance from the barrel, but it would be much more rigid since it would not be as far from the point of attachment. The biggest problem I am seeing with this so far is that I can't find any pictures of it having been done before. Is there a reason for that?