Trijicon's Bolt Action Mount w/ Trijicon Q-LOC(TM) Technology is designed to keep the optic as low as possible for hunting and long range precision rifle applications. Featuring a Mil-Spec drop test rated 6061-T6 aluminum design, and an easy to use one handed toolless mounting system.The spring-loaded design allows for constant retention and maintaining of zero even if the knobs are not tightened. This mount boasts a low weight and low profile design with precise return to zero performance, and is compatible with any Mil-Spec or NATO Picatinny rail.Designed specifically for variable powered optics, this lightweight mount is perfect for mounting Trijicon variable powered tube scopes with a 42mm objective lens and smaller, on any firearm platform with a picatinny rail. a Matte Black Anodized Finisha Made in the USA