This will be for those of you who do not want a clamp style mount that attaches directly to the barrel and/or shell tube.  Required tools & hardware: - Dremel & cutoff wheel - Vise - File - 20mm-25mm o-ring  - GG&G Benelli M2 sling and flashlight mount - Your light of choice that will mount to a pic rail Since the GG&G M2 light mount has a smaller scalloped cut than what is required to fit on the M3, some cutting and shaping is required: