The first truly high performance optic designed specifically for crossbows. The illuminated reticles accommodate speeds from 300 fps to 340 fps, 340 fps to 400 fps, 400 fps to 440+ fps, feature bolt drop stadia lines out to 80 yards, and has Bad River Outdoors' patented deer/ elk ranging capabilities. Together, they provide the ability for ranging and hold-over, all in the field of view; the first reticle of its kind.The Trijicon Compact ACOG Mount w/ Q-LOC(TM) Technology features a Mil-Spec drop test rated 6061-T6 aluminum design, with an easy to use one handed tool less mounting system. The spring-loaded design allows for constant retention and maintaining of zero even if the knobs are not tightened.The mount boasts a low weight and low profile design with superior return to zero performance and is compatible with any Mil-Spec or NATO Picatinny rail.- Matte black anodized finish- Made in the USATorque Spec (to rail):Spring Tension Only: 12-16 in. / lbs.Can be Tightened To: 44-66 in. / lbs.