Trijicon's Cantilever Mount with Trijicon Q-LOC features a Mil-Spec drop-test rated 6061-T6 aluminum design, with 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. It is perfect for mounting Trijicon variable-powered tube scopes with objective lenses up to 56mm.