The Sightmark Tactical 34mm Fixed Cantilever Mount is a fixed mounted riflescope base compatible with 34mm scope tubes. This mount features a twoinch forward offset allowing the use of riflescopes requiring a greater eye relief and more comfortable cheek placement on ARstyle rifles. The 34mm fixed mount is constructed of aircraftgrade 6061T6 aluminum and finished in a matte black nonreflective coating. Cantilever mounts make transferring your optic easy. This mount is perfect for installing and removing an optic from your firearm without losing zero.