Trijicon Cantilever Mount w/Q-LOC 34mm Tube 1.535 in Black. 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 an objective lens up to 56mm on any firearm platform with a picatinny rail. Trijicon's Cantilever Mount w/ Trijicon Q-LOC Technology at a height of 1.535 in. will also match the standard height above rail for all clip-on devices. Specifications for Trijicon Cantilever Mount w/Q-LOC: Manufacturer: Trijicon Fabric/Material: 6061-T6 Aluminum Color: Black Width: 2.07 in Condition: New Finish: Matte Anodized Country of Origin: USA Features of Trijicon Cantilever Mount w/Q-LOC Multiple proprietary recoil lugs ensure total rail engagement easily remove and re-attach without needing to confirm zero Compact circular design minimizes hazards of gear snags Heavy-duty springs ensure secure retention under heavy repeated recoil facilitates one-handed mounting Ensures optimal placement on MIL-STD 1913 NATO non-mil spec and even damaged rails Package Contents: Trijicon Cantilever Mount w/Q-LOC 1 Mount 2 Ring Caps 8 Screws 1 Hex Key Trijicon AC22038: Cantilever Mount w/Q-LOC 34mm Tube 1.535 in Black