Nikon 16451 Active Target Special BDC Riflescope The BDC Active Target Reticule utilizes a unique open circle design that doesn't obscure the sight picture and makes shot at moving targets easier Spring-Loaded Instant Zero-Reset turrets allow shooters to easily make adjustments in the field Riflescope includes an ARD (Anti Reflective Device) that eliminates game-spooking objective lens glare