The Trijicon Compact ACOG Rifle Scope Mount with Q-LOC 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 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. FeaturesLightweight 6061-T6 aluminum designTool-less mounting systemSpring loaded design allows for constant retention and maintain of zero