Nikon Buckmasters Rifle Scope 3-9X40 BDC Rifle Scope. 1" tube construction. Black matte finish. Field of view: 35.7-11.9ft @ 100yds. Features patented BDC reticle. The BDC reticle allows hunters to hold dead-on at ranges exceeding those previously thought possible. The BDC’s unique see-through ballistic circles offer an incredible advantage for long range shooting yet allows a normal sight picture for shorter-range shots where the crosshair itself is the aiming point. Features Brightvue multicoating optic.