The 30mm Fixed/LQD/w/ 20MOA Cantilever Mount by Sightmark Tactical is a riflescope base fixedly mounted and compatible with 30mm scope tubes. This mount, constructed of aircraft-grade 6061-T6 aluminum, is finished in a matte black, non-reflective coating. Featuring a two-inch forward offset, the 30mm fixed/LQD/w/ 20MOA mount facilitates the use of riflescopes requiring greater eye relief and a more comfortable cheek placement on AR-style rifles. Cantilever mounts simplify the process of transferring your optic, making it convenient for installing and removing the optic from your firearm without compromising zero. This mount is perfect for maintaining consistent zero even after optic adjustments.