The American Defense Manufacturing Delta Cantilever Scope Mount in 30mm, 1.7″ height (American Defense Mfg part no. AD-DELTA-C-M-30-STD) is built for putting high-power glass on a flattop AR-15 while keeping full use of the receiver’s rail space. American Defense Mfg designed the AD-DELTA with 2″ of built-in eye relief and a high 1.93″ mounting height that works well with night vision or gas masks in play, along with 4.4″ ring spacing to fit a wide range of scope tube lengths. Precision machined from 6061-T6 aluminum and finished in a hard coat T3 Mil-Spec anodize, the mount is built to hold zero under hard use. Horizontal split rings combined with the patented QD Auto Lock Lever system let it clamp securely to both in-spec and out-of-spec rail systems, and removal or reinstallation takes seconds without tools.

Key Specifications

• Ring diameter is 30mm, sized for a wide range of precision riflescopes.
• Mount height measures 1.7″, with a 1.93″ overall height for NV/gas mask clearance.
• Built-in eye relief measures 2″ for a cantilever forward scope position.
• Ring spacing is 4.4″ to accommodate a range of scope tube lengths.
• Constructed from 6061-T6 aluminum with a hard coat T3 Mil-Spec anodize finish.
• Uses the patented QD Auto Lock Lever system for tool-less mounting.

Frequently Asked Questions

Does this mount work with out-of-spec rails? Yes, the QD Auto Lock Lever system is designed to clamp securely to both in-spec and out-of-spec rail systems.

Why choose a cantilever mount? The cantilever design and 2″ of built-in eye relief position the scope forward on a flattop AR-15 for a proper cheek weld and eye relief.

Does this mount hold zero after removal? Yes, the QD Auto Lock Lever is built to return to zero reliably when reinstalled.

Buy the American Defense Delta Scope Mount

Get a tool-less, return-to-zero mount built for serious precision rifle use. Order this American Defense Mfg mount from our scope mounts selection, with fast, insured shipping from our Lubbock, Texas gun shop.