okay what i did was took 2 metal pipes, about an inch and a half wide. (im making a shotgun rail) then i took a decent amount of wood screws, 40 to be safe, and predrilled holes on the insides and outsides of the rail. (make sure you pre-drill the holes on the outsides of the pipe with a bit that the screw head will fit through. then on the inside pre-drill holes make sure the holes are small enough that the head of the screw doesnt fit through.) hope this helps guys.