The Midwest Industries 34mm Quick Detach Scope Mount features a low-profile base extended by only 1.4", so you can adjust for the correct eye relief. Compatible with scopes with up to a 56mm objective lens, this QD mount is great for AR-15 style rifles. The smooth functioning QD lever has a wide surface area for optimal contact with the rail for a secure lock. Fully adjustable without tools, you can affix this scope mount to any spec rail and adjust to the proper tension to ensure perfect return to zero function.Features: Adjustable quick detach levers Return to zero functionality Hardcoat anodized black Precision machined from 6061 aluminum 100% made in the U.S.A. with MI lifetime warrantyTechnical Specs: Works with scopes with up to a 56mm objective Overall length: 5.875 in. Width of rings: .85 in. Distance between rings: 2.80 in. Offset from the first ring: 1.40 in. Distance - top of rail to center line of ring: 1.55 in. Weight: 8.7 ouncesThis Midwest Industries Scope Mount is precision machined from 6061 aluminum and is hardcoat anodized for long term wear resistance. Made 100% in the United States from high quality materials, this mount also comes with a lifetime warranty through Midwest Industries.Midwest Industries is a quality manufacturer of tactical weapons accessories. They produce handguards, rails, and iron sights for many of the most popular weapon platforms like the AR-15, .308, Sig MCX, AK-47, and many more. Their goal is to manufacture the highest quality parts at affordable prices backed by a lifetime guarantee.