I'm not sure on the markings from the top rail as I don't plan on removing it anytime soon, but I'm sure there's a high probability; I've heard the HK mounts leave marks as well.@ lika1 Nice find and good on you. Got a lead from this site over the weekend from a member on another thread (thx @ KSH) on one @ MSRP and purchased Friday night and it’s getting here Thursday. I wanted to leave it in stock looking form, but leaning towards your setup after the visual pic you provided. Ordered the MI for lower hand guard which is also now enroute. However Top rail was out of stock on their website. Was curious if you were to remove the MI top rail would there be markings left behind from top mount or trq screws?