Holosun ARO & HM3X Combo Kit — 2 MOA Red Dot, 3x Magnifier

Holosun ARO & HM3X Combo Kit (ARO-RD2 & HM3X) is a red dot sight paired with a 3x magnifier designed to provide quick target acquisition at close range and extended capability at moderate distances. The package includes the enclosed ARO 2 MOA red dot optic and the HM3X magnifier housed in a protective hard case.

This combo solves the need for a compact, low-profile aiming solution that can shift from 1x rapid engagement to 3x magnified observation without swapping optics. The ARO’s 22mm housing and lower 1/3 co-witness pedestal mount support sight alignment on modern rifle platforms, while the HM3X magnifier offers adjustable focus for mid-range use. The system is suitable for range use, training, and general-purpose rifle setups that use 1913 Picatinny rails.

• 2 MOA red dot reticle for precise aiming; dot size: 2 MOA.
• 22mm objective / compact 22mm housing designed to work with Holosun magnifiers.
• Enclosed aluminum housing with a lower 1/3 co-witness pedestal mount (1.63-inch lower 1/3 pedestal).
• Power: single CR2032 battery; Shake Awake power-saving feature and 12 brightness settings including 2 night-vision-compatible modes.
• HM3X magnifier provides 3x magnification with adjustable diopter and extended eye relief for comfortable sighting.
• Mounting: compatible with Picatinny/Weaver rails; optic footprint listed as Picatinny.
• Durability: IP67-rated protection for water and dust resistance; hard case included for secure transport and storage.
• Lightweight: listed weight approximately 5.56 oz for the optic component; compact overall dimensions for mounted use.

Specifications & Construction
Materials and construction: aluminum enclosed housing. Power source: one CR2032 battery. Dot size / reticle: 2 MOA red dot. Objective / footprint: 22mm objective, Picatinny optic footprint. Weight: approximately 5.56 ounces. Dimensions (listed): 3.95 x 6.95 x 9.25 inches. Environmental rating: IP67 water and dust resistance.

Compatibility & Intended Use
Fits 1913 Picatinny rails and is listed as compatible with Picatinny/Weaver mounting systems. Typical setups include use on AR-style rifles and other platforms with a 1913 rail where a low-profile red dot plus a magnifier is desired. The combo supports a primary red dot configuration at 1x with the option to add 3x magnification for mid-range observation and precision work.