The new Monarch M5 riflescope is one Nikon’s most advanced riflescopes. Low profile turrets and caps are ergonomically shaped to match the riflescope’s sleek modern profile, as are its side focus parallax adjustment, zoom ring and ocular focus ring. The Nikon Monarch M5 riflescope features a large ocular lens that deliver an ultra-clear and ultra-bright sight picture is most light conditions. Features of the Monarch M5 RiflescopeFully Multicoated Optics with multiple layers of anti-reflective coating on all air-to-glass surfaces maximizes light transmission, brightness and contrastGenerous, Consistent Eye Relief keeps your brow safe4x Zoom Ratio offers maximum magnification versatilityWaterproof O-ring sealed to prevent moisture from entering bodyShockproof body shrugs off hard recoil and rugged useNitrogen Purged using nitrogen gas for total reliability against thermal shock and internal fogging30mm diameter main body tubeCompatible with Nikon's Spot On Custom TurretsQuick Focus Eyepiece has a smooth-turn aluminum ring with rubberized eye guard that allows crisp reticle focus and quick target acquisitionSide Focus Parallax Adjustment knob allows adjustment without changing shooting positionSpring-Loaded Instant Zero-Reset Turrets for both Windage and Elevation knobs can be reset to "zero" after sighting-in for easy reference when making field adjustments Nikon MONARCH M5 4-16x42SF M BDC Riflescope 16652