A good reference for depth is to make sure the bottom front of the Raptor charging handle is flush with the top of the BCG. The picture shows the correct fitting. Hope this helps. It's what I did with a little time and patience, And like someone posted earlier make it deep enough and wide enough and don't do to much you don't want it to thin. File clean test , file clean test.
After doing this mod which I had some trepidation about I would recommend both the Rainier arms Raptor and the m&p10. Looks and feels sweet together .
Last edited by eddieisakson; 11-22-2013 at 10:33 PM.
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