CNC machined 6061-T56 aluminum body with 42mm ID. Includes one Razor pin machined from 10-18 steel for durability with a 0.012" throat for minimum target obstruction. Features eight 8-32 threaded holes for optional integrated pin kit and 7/16"-20 threaded hole for optional rheostat light. Comes with three colored levels and three colored sticks of fiber. A variety of optional sunshades can be threaded into the front and rear of the scope. This scope allows for a lens to be run on either side of the scope. All Shrewd scopes are machined with a recessed hex to adapt to a standard round, hex or square scope mounting rod.