Nikon 6320 Prostaff 3&ndash;9 X 40mm Matte Riflescope (BDC) ProStaff riflescopes accommodate most hunting styles, with enough power for long-range shots and wide field of view for thick brush and timber 3-9x40 riflescope is designed for center fire rifle hunting of big game and varmints High-performance lenses coated with multiple layers of anti-reflective compounds to boost light transmission, improve contrast 100 percent water and fog-proof housing, O-ring sealing and nitrogen filling ensure moisture never penetrates interior Includes limited lifetime manufacturer's warranty, deliver true color rendition and flare-free viewing, and enhance overall image quality