Aimpoint ACRO S-2; Master your shot with instinctive aiming and absolute clarity.

The Aimpoint ACRO S2 is a compact reflex optic purpose-built for shotguns, featuring an integrated mount for ventilated ribs. Its primary benefit is dramatically accelerated target acquisition, achieved with a large 9 MOA red dot that simplifies lead visualization and refines muzzle swing. This optic is essential for any shooter because its ultra-low profile allows for a proper, instinctive gun mount, providing a critical advantage in speed and accuracy for sporting, hunting, or tactical applications.
Versatile & Secure Mounting: The sight features a carbon fiber-reinforced rib mount that is both ultra-low and incredibly strong. It includes interchangeable base plates to ensure a secure fit on most standard shotgun rib sizes (6-12mm), creating a stable and reliable platform that withstands recoil without adding bulk.
Unobstructed Sight Picture: The ACRO S-2's sleek, fully enclosed housing and an optical axis of just 15 mm enable true, two-eyes-open shooting. This design provides a clean, unobstructed field of view, which enhances situational awareness and promotes a natural, repeatable cheek weld for faster engagement.
Extreme Durability & Power: Constructed from high-strength anodized aluminum, the ACRO S-2 is fully waterproof and submersible to 5 meters (15 feet), ensuring performance in the harshest conditions. The unit delivers over 50,000 hours—more than five years—of constant-on operation from a single CR2032 battery, guaranteeing your optic is always ready.

Aimpoint ACRO S2 Review

Aimpoint ACRO S2 Features and Specifications

The Aimpoint ACRO S-2 is engineered to solve the primary challenge of shotgun aiming: achieving rapid and accurate target engagement. Its core value lies in the combination of a large 9 MOA red dot—which simplifies lead visualization—and an ultra-low integrated rib mount that allows for a natural, instinctive sight picture. This purpose-built design provides a clear, parallax-free point of aim while keeping both eyes open for maximum situational awareness. For any operator in sporting, hunting, or defensive roles, the ACRO S-2 is essential because it directly translates to faster muzzle control, higher hit probability, and greater confidence under pressure.

Key Features

Purpose-Built Shotgun Optic: Designed specifically to mount on the ventilated rib of a shotgun, providing a seamless and dedicated sighting system.
Large 9 MOA Red Dot: Optimized for shotgun use, the large dot allows for extremely fast and intuitive target acquisition, simplifying lead visualization on moving targets.
Ultra-Low Optical Axis: The sight sits exceptionally low on the barrel, promoting a proper cheek weld and natural gun mount for an unobstructed field of view with both eyes open.
Extreme Battery Life: Offers over 50,000 hours (more than 5 years) of constant-on operation from a single CR2032 battery, ensuring your optic is always ready.
Durable & Waterproof Construction: A fully enclosed housing made of high-strength aluminum protects the optic from the elements and ensures it is waterproof down to 5 meters (15 feet).
Versatile Mounting System: Includes a set of interchangeable base plates, allowing the integrated carbon-fiber mount to fit most common shotgun rib sizes securely.

Specifications

Dot Size: 9 MOA
Battery Type: CR2032
Battery Life: 50,000 hours of constant operation
Mounting Solution: Integrated carbon fiber reinforced polymer shotgun rib mount
Rib Compatibility: 6 mm to 12 mm (0.24 in to 0.47 in)
Optical Axis Height: 15 mm (0.6 in) from top surface of mechanical interface
Brightness Settings: 10 intensity settings for various light conditions
Housing Material: Anodized high-strength aluminum
Finish: Semi-matte black
Weight (Sight Only): 74 g (2.6 oz)
Waterproof Rating: Submersible to 5 meters (15 feet)
Optical Magnification: 1X (non-magnifying)
Parallax: Operationally parallax-free

A shooter aims a Purdey shotgun equipped with the Aimpoint Acro S-2, utilizing its 9 MOA red dot for easier targeting.

What's in the box of the ACRO S-2?

(1) Aimpoint ACRO S-2 Red Dot Reflex Sight
(1) Set of Interchangeable Base Plates
(1) Base Plate Selection Guide
(1) CR2032 Battery
(1) Aimpoint Tool

A shotgun rests inside a hunting blind, with the Aimpoint Acro S-2 in the foreground showing its windage and elevation adjusters.

Aimpoint Acro S-2 FAQs

What type of firearm is the Aimpoint ACRO S-2 designed for?

The Aimpoint ACRO S-2 is specifically designed as a shotgun red dot sight. It features an integrated shotgun rib mount that is engineered to fit most ventilated shotgun ribs on the market.

Will the ACRO S-2 fit my specific shotgun?

The ACRO S-2 is designed for broad compatibility with most shotgun models. The sight comes with interchangeable base plates to accommodate most popular shotgun rib sizes, specifically those ranging from 6-12mm (.24 to .47 inches). This ensures a secure and low-profile fit on your firearm.

What is MOA, and why is the 9 MOA dot size important for a shotgun?

MOA stands for Minute of Angle, which is an angular measurement used in optics. As a rule of thumb, one MOA equals about 1 inch at 100 yards. The Aimpoint ACRO S-2 features a large 9 MOA red dot, meaning the dot itself covers a 9-inch area on a target at 100 yards.

For a shotgun user, this large dot is a significant advantage. It is not designed for small, precise adjustments but for rapid target acquisition. The 9 MOA dot allows your eye to pick up the aiming point instantly, simplifying lead visualization on moving targets like game birds or clays and helping you automatically refine your muzzle swing for a successful shot.

aimpoint acro s2 shotgun red dot being used by a hunter aiming at a partridge

Is the Aimpoint ACRO S-2 Shotgun Sight waterproof and durable?

Yes. The sight is built with a fully enclosed, high-strength aluminum protective housing, making it a truly waterproof red dot sight. It is submersible to a depth of 5 meters (15 feet), ensuring reliable performance in any weather condition.

What is the battery life of the ACRO S2 Aimpoint, and what type of battery does it use?

The Aimpoint ACRO S 2 offers an impressive battery life of 50,000 hours, which is over five years of continuous operation on a single battery. It uses one CR2032 battery, which is included with the sight.

What are the main benefits of the ultra-low optical axis?

The ultra-low optical axis of 15 mm allows for proper and natural gun mounting. This design lets you maintain a correct cheek weld, similar to using standard iron sights, and contributes to a clearer, unobstructed field of view with both eyes open. The result is faster, more instinctive aiming with your shotgun.

Where can I purchase the Aimpoint ACRO S-2?

Atomic Defense is an authorized and trusted dealer for Aimpoint products. When you purchase your ACRO S-2 Aimpoint from us, you are guaranteed to receive a genuine product with the full manufacturer warranty. We are committed to providing access to the highest quality, original Aimpoint optics alongside reliable customer support and excellent service. Our knowledgeable team is dedicated to ensuring you have a smooth and satisfactory purchasing experience.

I already use a bead sight. Why should I put a red dot on my shotgun?

A shotgun red dot sight, like the Aimpoint S2, offers significant advantages in speed, accuracy, and confidence over a traditional bead sight. While a bead is effective, a red dot provides a single, illuminated focal point that allows for faster target acquisition and improved situational awareness by allowing you to shoot with both eyes open.

Aimpoint Acro S-2 9 MOA Key benefits include:

Faster Target Acquisition: The large 9 MOA red dot is easier for your eye to pick up instantly compared to aligning a bead, especially against complex backgrounds or in dynamic situations.
Improved Accuracy on Moving Targets: The dot simplifies lead visualization on moving targets like birds or clays. This helps you automatically refine your muzzle swing and positioning for a higher probability of a direct hit.
Enhanced Field of View: The ACRO S-2 is a parallax-free optic with an ultra-low profile that promotes a natural sight picture with both eyes open. This gives you an unobstructed view of the target and its surroundings, unlike the focused tunnel vision that can occur with a bead.
All-Light Performance: Unlike a simple bead, the ACRO S-2 features 10 intensity settings, with brighter options for use against a bright sky, ensuring your aiming point is always visible.