Turk, the Aimtech mount didn't "scratch" my M1 but it did rub off an almost unnoticeable teeny-tiny bit of finish from one high spot where it touched. I consider it inconsequential fair-ware-and-tear, and it probably could have been prevented with the application of a little duct tape. Ultimately I think I came out ahead since the Aimtech mount encases the receiver it protects it from damage in the field. -- Kernel