The Leupold Mark 4 AR 30mm Matte (Model: 182860) is a highly rigid, one-piece Integrated Mounting System (IMS) engineered to address the specific spatial challenges of mounting optics on flat-top receiver rifles. CNC-machined from a single block of aircraft-grade aluminum, this monolithic mount combines the base and rings into a single unit. This design eliminates alignment drift, reduces the overall parts count, and provides a stable connection capable of withstanding heavy recoil and demanding field conditions. Finished in a non-reflective matte black, it ensures a low-profile aesthetic while maintaining structural integrity.

Key Features:

• Forward Cantilever Offset: Features a 1.75-inch (4.45 cm) forward offset, allowing shooters to position the optic further forward to achieve correct eye relief and a natural cheek weld without mounting onto the handguard.
• Monolithic Rigidity: One-piece construction ensures alignment between the front and rear rings, eliminating the need for ring lapping and preventing scope tube binding.
• Optimal Height Alignment: The ring height of 1.4 inches (Super High style) positions the centerline of a 30mm scope tube at the same height as standard iron sights on flat-top receivers.
• Picatinny Compatibility: Designed to clamp securely onto any standard MIL-STD-1913 Picatinny rail.
• Precise Torque Specifications: Engineered for secure fastening with a keeper clamp torque spec of 65 in-lbs and ring top screw torque spec of 28 in-lbs to maintain a reliable zero.

Technical Specifications:

• Tube Diameter Compatibility: 30 mm
• Material: CNC-machined aircraft-grade aluminum
• Finish: Non-reflective Matte Black
• Weight: 6.05 oz (approximately 171.5 grams)
• Overall Length: 5.43 inches (13.79 cm)
• Ring Width: 1.77 inches (4.5 cm)
• Ring Height: 1.4 inches (Super High)
• Length Within Rings: 3.46 inches (8.79 cm)
• Forward Cantilever Offset: 1.75 inches (4.45 cm)

Who It Is For:

The Leupold Mark 4 AR IMS is designed for shooters who require a robust, repeatable mounting solution for 30mm maintube optics on flat-top receiver platforms. While originally developed for AR-style platforms, this mount is highly utilised in the Australian market by target shooters, hunters, and competitive PRS and IPSC competitors. It is an ideal fit for modern bolt-action chassis rifles popular in Australia, including the Ruger Precision Rifle, Tikka T3x TAC A1, and Howa APC. It is also highly compatible with pump-action and straight-pull rifles equipped with full-length Picatinny rails, providing the necessary height and forward positioning for comfortable, accurate shooting.