Aluminum scope housing with built in level, sight pin with adjustable rheostat, and crosshair insert. This setup allows for more precise aiming no matter the conditions. Accepts Axcel sight pins, lenses, and other accessories. Includes InchT Inch Connection rod for use with Axcel sights, 10-32 stainless rod, and lens retainer ring. Available in 25mm (uses 29mm lens), 31mm, and 41mm.