Just curious about how those of you without rail systems on your ARs mount lights. I know about the Surefire M500, but I'm not really interested in changing the handgaurd configuration. I'm not sold on the idea of barrel clamps, I would think that a front sight base mounted light would provide more stability. I know SOG makes a tri-rail that bolts on, which seems nice if you want a light and some type of IR device; along with your sling mount (link here: http://www.sogarmory.com/ProductDtls.aspx?id=102447). I have also heard of the surefire 674 (link: http://www.surefire.com/maxexp/main/co_disp/displ/prrfnbr/532/sesent/00/Classic-Front-Sight-Post-Mounted-Modular-Systems); these mounts put the light in the same position that the M500 would. Are there any other options that I can consider? Thanks.