Designed for extreme sighting speed and long range accuracy with AR-10
rifles and the 308 WIN/7.62mm NATO round, the M-308 provides flagship Nikon optics and repeatable 800-yard precision. The M-308 line features Interchangeable Turret Technology for customized precision with virtually any load. To simplify field adjustments, Nikon has integrated Instant Zero-Reset Turrets into all new M-308 riflescopes. Just sight-on as usual, then lift the adjustment knob, rotate to your "Zero" and re-engage. Fully multicoated optics provide up to 95% light transmission for a bright, sharp sight picture in any shooting light between dawn and dusk.
AR-15, Issue:11, Page:100
Big Book Catalog, Issue:69, Page:276
Sinclair, Issue:5B, Page:183