The Sightmark 34mm Fixed Cantilever Mount is a fixed mount design that fits 34mm riflescope tubes. The 34mm mount is constructed from a durable 6061-T6 aluminum with a matte black, non-reflective finish. The .5 in. forward offset allows for proper scope mounting which provides correct eye relief on an AR-15. This Sightmark mount is also crafted with a built-in 20 MOA taper to help compensate for long range shooting adjustments.