The M-308 4-16x42 represents Nikon's Precision AR Optic technology for heavier caliber rifles capable of long-range accuracy. A large magnification range combined with an oversize lens provides accurate shots with heavy caliber rifles in any conditions. Developed specifically for the trajectory of the .308 Win/7.62 NATO Match round with 168gr. HPBT match bullet. The BDC 800 reticle is designed for a 100 yard zero on the crosshair - with points representing all ranges from 200 to 800 yards. Like all of Nikon's riflescopes, the M-308 series is optimized for use with Nikon Spot On Ballistic Match Technology. Spot On allows you to discover all of the exact aiming points on your scope's reticle at various yardages for your specific ammunition and load. To simplify field adjustments, the M-308 utilizes Spring-Loaded Instant Zero-Reset Turrets. Just sight-in as usual, then lift the spring-loaded adjustment know - b, rotate to your "zero", and reengage. Field adjustments are now as simple as dialing-in your subsequent ranges. Nikon has engineered the entire optical system of the M-308 to provide the shooter with a bright, sharp, incredibly flat sight picture and light transmission up to its theoretical maximum-95%, allowing for a clear sight picture from dawn to dusk. Magnification : 4 (more...)