Holosun ARO CORE MRS

• Multi-Reticle System: The selectable 2 MOA dot, 65 MOA ring, or combined circle-dot lets the sight adapt to different shooting speeds, from fast target acquisition at close range to more precise aiming on smaller targets.
• 22 mm enclosed tube design: The compact enclosed housing protects the emitter from rain, dust, and impact while keeping the sight picture clean and consistent on rifles and carbines used in hard field conditions.
• 50,000-hour battery life: Long runtime from a single CR2032 reduces battery changes and makes the optic practical for regular training, duty use, and a rifle that stays ready between range sessions.
• Shake Awake illumination: Motion-activated activation helps preserve battery life while bringing the reticle back on when the rifle is moved, so the sight is ready without constant manual power management.
• Aimpoint Micro footprint compatibility: The Aimpoint Micro mounting standard gives broad mount compatibility and makes it easier to fit the optic to different carbine, AR, and low-profile setups.

About the Holosun ARO Series

The Holosun ARO series builds on the company’s established 20 mm 403 and 503 pattern rifle optics, but moves to a 22 mm enclosed housing that is designed to work especially well with Holosun magnifiers. In Holosun’s lineup, the ARO family sits as a compact rifle-sight platform for shooters who want a familiar tube-style red dot with updated proportions, modern mounting height options, and the practical durability of an enclosed emitter design.

ARO-CORE models focus on the essentials that matter on a carbine: an aluminum housing, motion-activated Shake Awake illumination management, and reticle options that let the user choose between a simple dot or Holosun’s Multi-Reticle System. The series is configured around modern rifle and carbine use, with a 1.63-inch lower-third co-witness mount concept that suits AR-platform ergonomics while still allowing low-mount configurations where needed. The result is a compact enclosed sight family intended for hunting optics, training rifles, defensive carbines, and general-purpose tactical optics where fast presentation, straightforward controls, and dependable construction matter more than unnecessary complexity.

About the Holosun ARO CORE MRS

The Holosun ARO CORE MRS is a 1x small tube red dot sight built for shooters who want a compact enclosed optic with flexible reticle options and minimal bulk on the rifle. Its defining feature is Holosun’s Multi-Reticle System, which combines a 2 MOA central dot with a 65 MOA ring. In practice, that gives the sight two distinct strengths: the ring helps the eye pick up the reticle quickly during close, fast shooting, while the fine dot supports more deliberate shot placement when the target is smaller or the distance stretches a bit farther. Because the reticle is illuminated and brightness-adjustable, the sight remains usable across changing light conditions.

The parallax-free design and unlimited eye relief characteristics expected from this type of optic make the ARO CORE MRS easy to use from unconventional shooting positions and during rapid transitions. Its 0.5 MOA click adjustments allow reasonably fine zeroing for a carbine optic, while the ±50 MOA travel range gives enough adjustment latitude for common rifle setups. The 22 mm window keeps the housing compact without making the sight feel cramped, and the 125.00 g body weight helps preserve the handling balance of lightweight carbines.

Holosun also gives this model the practical durability expected from a modern enclosed rifle sight. The aluminium housing, nitrogen-filled construction, and waterproof, fogproof, and shockproof build help the optic stay serviceable in poor weather, temperature swings, and routine knocks. With a stated 50,000.00 h battery life from a CR2032 cell and motion-based Shake Awake operation, the ARO CORE MRS is well suited to rifles that need to stay ready for regular range use, field carry, or defensive roles.

About Holosun

Holosun is a California-headquartered optics company focused on sights, lasers, and illumination systems for shooting, hunting, law enforcement, and military use. The company says it has worked on optics and laser and infrared technologies since 2013, and its product history identifies the 403 Series as the starting point of the brand’s commercial sight lineup in 2015. Later launches such as the 510C in 2016 and the 507C and 508T pistol optics in 2017 helped establish Holosun as a major name in reflex and enclosed sight design.

Holosun is particularly known for practical electronic features that solve real use problems, including Shake Awake, Solar Failsafe, and the Multi-Reticle System. Those technologies, together with a broad catalog and a global manufacturing network, have given the brand a strong reputation among shooters looking for durable, feature-focused optics across rifle, pistol, and laser categories.

Main Features

• Magnification: 1x
• Reticle: 2 MOA Dot, 65 MOA Ring
• Reticle illumination: Yes
• Adjustable intensity: Yes
• Parallax setting: Parallax-free
• Adjustment per click: 14mm/100m - 1/2MOA
• Windage adjustment range: 14.45 mrad / 50.00 MOA
• Battery: CR2032
• Battery life: 50000.00 h
• Length: 63.00 mm
• Width: 39.00 mm
• Height: 67.00 mm
• Weight: 125.00 g
• Housing material: Aluminium
• Window size: 22
• Mounting standard: Aimpoint Micro
• Working temperature range: -30°C to +60°C
• Nitrogen filled: Yes
• Waterproof: Yes
• Fogproof: Yes
• Shockproof: Yes

Warranty

10 years. Holosun states a 10-year warranty for the illumination system, which is the explicit numbered warranty period associated with this optic category.

In the Box

• Holosun ARO CORE MRS sight
• CR2032 battery
• 1.63" mount
• 1.05" mount
• Lens cloth
• Multi-tool
• Wrench
• Manual
• Warranty card