Discoveryopt® Heavy Duty 30 mm Cantilever Scope Mount, 1.5″, 20 MOA

The Discoveryopt Heavy Duty cantilever mount is designed for riflescopes with a 30 mm main tube and interfaces with a MIL-STD-1913 Picatinny rail. Its reinforced one-piece construction incorporates a fixed 20 MOA cant that increases the usable elevation adjustment range for long-range shooting. Each ring cap is secured by 6 Torx screws, while 3 additional screws attach the base to the rail. The mount is CNC-machined from 6061-T6 aluminum and finished with Type III hard-coat anodizing.

Reinforced One-Piece Construction

The lower ring halves and cantilever base are CNC-machined as a single unit. Each ring cap is secured by 6 Torx screws, providing 12 ring-cap screws in total. The cantilever design positions the riflescope farther forward relative to the base attachment point, helping the user establish the required eye relief.

1.5-Inch Optic Centerline

The riflescope centerline sits 1.5 in / 38.1 mm above the top surface of the mounting rail. This configuration provides clearance between the riflescope and firearm and is suitable for modern rifle platforms equipped with a continuous top rail.

Fixed 20 MOA Cant

The fixed 20 MOA cant angles the riflescope relative to the mounting rail and shifts more of its usable elevation adjustment range toward longer-range corrections. The manufacturer specifies resistance to shock loads of at least 1,000 G.

6061-T6 Aluminum Construction

The mount is CNC-machined from 6061-T6 aluminum alloy and protected by a Type III hard-coat anodized finish for increased surface hardness and resistance to wear. Precision-machined ring interiors provide consistent contact with the riflescope tube. The manufacturer specifies coaxiality of ≤ 0.01 mm/m. The mount weighs approximately 179 g.

Specified Tightening Torques

Each ring cap is secured by 6 Torx screws, while 3 mounting screws attach the base to the rail. The specified torque values are marked directly on the mount: 20 in-lb / approximately 2.3 Nm for the ring-cap screws and 30 in-lb / approximately 3.4 Nm for the base mounting screws.

Key Benefits:

• designed for 30 mm riflescope tubes
• compatible with MIL-STD-1913 Picatinny rails
• reinforced one-piece Heavy Duty construction
• cantilever design for forward optic placement
• 1.5 in / 38.1 mm optic centerline height
• fixed 20 MOA cant
• 6 Torx screws on each ring cap
• 12 ring-cap screws in total
• 3 base mounting screws
• 6061-T6 aluminum alloy
• CNC-machined construction
• Type III hard-coat anodized finish
• precision-machined ring interiors
• ring-cap screw torque of 20 in-lb / approximately 2.3 Nm
• base mounting screw torque of 30 in-lb / approximately 3.4 Nm
• coaxiality of ≤ 0.01 mm/m
• shock resistance of at least 1,000 G
• approximately 179 g weight