I just had one of the Diamond Free Floats installed by my gunsmith. What the hell are these threaded holes for at the end of each rail? What can I use to plug these holes. I had thought about ordering some of the anti-rotation screws from YHM, but was unsure if these would work. Usually in this situation I would take what ever I am working on to the local hardware and find a machined screw or plug to fit. I don't want them calling in SWAT if I walk in with a rifle upper so what can I do?