High precision long range optical systems. First Focal Plane, Wide Angle system. 11 layer fully multi-coated optics for superior clarity. Side focus control for parallax adjustment to infinity. 30mm mono-tube chassis for superior strength. Glass etched reticle with red and green illumination. Rheostat on saddle offers 5 levels of brightness. 1⁄10 MRAD exposed and locking turrets. Fast focus eyebell and high torque zoom ring. Nitrogen purged- water, fog and shock proof.