The Trijicon ACOGA(R) 2x20 riflescope is well-suited to firearms with limited space, like UZI, H&K or MP-5 9mm submachine guns. With a step-up in fixed magnification, this illuminated reticle riflescope increases target detection distance in any lighting conditions. 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-S Mfg: Trijicon