Seen a few post on here talking about tapping your shotguns to mount Scope /red dot and I have question for you. If your in Knoxville area who tapped your gun, I have two I want to get done one is a TriStar raptor and it has a aluminum receiver would this be a problem? The second is a 870 so it has a steel receiver so I don't suppose that would be a problem or would it. Last question for both , what rail do you use Ex. Remington 700,Savage etc, I plan on adding a Nikon Spur Red Dot or possibly a low power shotgun scope if I cannot adjust my eyes to the Red dot.