The Hi-Lux Optics 1-4x24mm CMR model is one extremely well designed riflescope that's right at home on a wide range of modern semi-auto or full-auto tactical rifles and carbines. At just 10.2 inches in length, and weighing 16.5 ounces, this 30mm scope does not add a lot of bulk or weight to the gun, keeping it fast handling. Hi-Lux Optics' engineers developed an extremely practical reticle that aids in obtaining exceptionally fast target acquisition when things get up close and personal in very short order. An illuminated circular center reticle and dot draws the eye to the center of the sight picture and to the center of the target - and to keep that sight picture uncluttered the reticle consists of a horizontal crosshair and a partial lower crosshair. Fully multi-coated lenses and a true 1x lower magnification insure you'll get on target quickly when the shooting is indeed at very "Close Range". For longer-range work, aiming points along the lower crosshair have been calibrated for standard .223 (5.56mm) and .308 Win. (7.62mm) service rounds out to 600 meters. The 4x upper magnification makes precise shot placement possible. Other great features of the CMR1-4x24 include: The Leatherwood/Hi-Lux Optics "Zero Locking System". Once you've sighted the scope, you can actually lock that alignment in place. The system still allows you to make minor adjustments to tweak shot placement - then return the setting back to zero. Rigid and tough one-piece aluminum 30mm tube. Wear resistant Perma-Coat soft luster blue-black finish. Tri-Center coil spring tension on erector tube for positive windage and elevation adjustment. Fast Focus large diameter ocular lens.