Sightmark SM34020 30mm Cantilever QD Mount 20 MOA Picatinny

The Sightmark SM34020 eliminates the need for separate rings and bases with its integrated cantilever design that positions optics at optimal eye relief distance. This single-piece aluminum mount combines strength with the convenience of quick-detach operation for rapid scope changes.

What Makes This Different

The cantilever design extends the scope forward, providing proper eye relief for AR-15 platforms and other tactical rifles where standard rings place optics too close to the shooter's face. The built-in 20 MOA cant compensates for bullet drop at extended ranges, effectively extending the scope's elevation adjustment range. Unlike traditional ring sets that can introduce alignment issues, this one-piece construction maintains perfect scope alignment.

Key Features

• Quick-detach levers allow tool-free installation and removal while maintaining zero return
• 20 MOA built-in cant maximizes long-range elevation adjustment capability
• 30mm tube diameter accommodates most tactical and precision scopes
• Cantilever design provides 3.5-inch forward scope positioning for proper eye relief
• Aircraft-grade aluminum construction with matte black Type III hard anodizing
• Picatinny rail interface fits MIL-STD-1913 specification rails
• Low-profile design minimizes snag hazards and maintains clean rifle lines

Field performance centers on the mount's ability to maintain zero through repeated installations. The QD mechanism locks with 65 inch-pounds of clamping force, sufficient for magnum calibers and semi-automatic platforms. The 20 MOA cant proves valuable for precision shooting beyond 600 yards, where standard mounts exhaust elevation adjustment. Competition shooters and tactical operators benefit from the quick-change capability when switching between different magnification optics.

Technical Specs

• Tube diameter: 30mm
• Rail interface: Picatinny/Weaver compatible
• Cant: 20 MOA built-in
• Material: 6061-T6 aluminum alloy
• Finish: Matte black hard anodized
• Weight: 8.2 ounces
• Overall length: 5.5 inches
• Ring height: 1.5 inches from rail to scope centerline
• Country of origin: China

This mount addresses the specific requirements of tactical rifle configurations where standard ring height and positioning create eye relief problems. The combination of quick-detach convenience and precision manufacturing makes it suitable for applications demanding both flexibility and accuracy.