Anyone have more details on the Magpul forend? I'm looking for one that I can run with a Surefire M952. I'd like to use the pressure switch and run the wire thru the forend but outside the tube. What kind of clearance is there between the tube and the housing? I don't mind getting creative with the dremel if there is room. Once the wire is run and mounted there won't be any wear since it will be outside the mag tube, just curious if there is room. Looking at a stock corn cobb forend it's obvious the idea will work in principle since there are three 3/16" rails running along the inside of the tube, I just wasn't sure if the Magpul forend had similar rails and room.