Discoveryopt® Heavy Duty 30 mm Cantilever Scope Mount with Top Rail, 1.5″, 0 MOA

The Discoveryopt Heavy Duty Top Rail 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 provides a 1.5 in / 38.1 mm optic centerline height and a neutral 0 MOA cant. The mount also incorporates a top Picatinny accessory rail and an integrated bubble level for monitoring rifle cant. It is CNC-machined from 6061-T6 aluminum and finished with Type III hard-coat anodizing.

Heavy Duty One-Piece Construction

The lower ring halves and base are CNC-machined as a single unit. Each ring cap is secured by 6 screws, providing 12 ring-cap screws in total, while 3 mounting screws secure the base to the Picatinny rail. The cantilever design positions the riflescope farther forward, helping the user establish the required eye relief.

Top Picatinny Accessory Rail

One ring cap incorporates a Picatinny rail for mounting a compatible accessory directly above the riflescope. This allows the setup to be expanded without occupying additional slots on the firearm's primary mounting rail.

Integrated Bubble Level

An integrated bubble level allows the shooter to monitor rifle cant. This is particularly relevant during precision shooting at extended distances, where cant can cause a horizontal shift in the point of impact.

1.5-Inch Centerline and Neutral 0 MOA Cant

The riflescope centerline sits 1.5 in / 38.1 mm above the top surface of the mounting rail. The mount has a neutral 0 MOA cant and does not introduce an additional elevation angle intended to extend the riflescope's usable adjustment range at longer distances.

6061-T6 Aluminum Construction

The mount is CNC-machined from 6061-T6 aluminum alloy and protected by a Type III hard-coat anodized finish. This surface treatment improves resistance to wear, scratches, and corrosion. The manufacturer specifies coaxiality of ≤ 0.01 mm/m and resistance to shock loads of at least 1,000 G.

Key Benefits:

• designed for 30 mm riflescope tubes
• compatible with MIL-STD-1913 Picatinny rails
• one-piece Heavy Duty cantilever construction
• 1.5 in / 38.1 mm optic centerline height
• neutral 0 MOA cant
• top Picatinny accessory rail
• integrated bubble level
• 6 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
• coaxiality of ≤ 0.01 mm/m
• shock resistance of at least 1,000 G