Elevate Your Aim: The Holosun HE403B-GR Green Dot Sight – Precision, Durability, and Unmatched Performance for Your Rifle or Carbine

Are you searching for an optical sight that offers rapid target acquisition, exceptional battery life, and robust construction without compromising on clarity? Do you need an optic that performs flawlessly in diverse lighting conditions, from bright daylight to low-light tactical scenarios, and even with night vision devices? If you're a rifle or carbine owner looking to enhance your shooting accuracy, speed, and overall effectiveness, the Holosun HE403B-GR Green Dot Sight is engineered precisely to meet and exceed those demands.

This advanced 20mm micro sight is a game-changer for anyone invested in sport shooting, hunting, tactical applications, or home defense. It addresses common challenges faced by shooters: slow target acquisition with iron sights, limited battery life of conventional optics, and the fragility of less robust alternatives. The HE403B-GR provides a definitive solution, offering a clear, crisp green dot for immediate sight picture, an astonishing 50,000-hour battery life, and a housing built to withstand the rigors of real-world use. Whether you're a seasoned professional or just beginning your shooting journey, this versatile optic simplifies complex shooting situations and boosts your confidence.

Unveiling the Holosun HE403B-GR: A Deep Dive into Its Core Strengths

The Holosun HE403B-GR isn't just another red dot sight; it’s a meticulously designed green dot optic that leverages cutting-edge technology to deliver superior performance. Its core distinction lies in the Holosun Green Super LED, which emits a vibrant 2 MOA green dot. Why green? Green is a color to which the human eye is exceptionally sensitive, often making the reticle appear brighter and more vivid, especially against certain backgrounds or in specific lighting conditions, which can lead to faster target acquisition and reduced eye strain during extended use. This 2 MOA dot size strikes a perfect balance, being fine enough for precise aiming at longer ranges while still being large enough for rapid, close-quarters engagements.

Extended Battery Life and Smart Power Management: One of the most common frustrations with electronic optics is the constant need for battery replacement. The HE403B-GR virtually eliminates this concern with its astounding 50,000-hour battery life on a single CR2032 battery. This translates to over five years of continuous operation on a medium setting, meaning you can trust your optic to be ready when you are, without frequent checks or replacements. Adding to this impressive longevity is Holosun's innovative Shake Awake™ technology. This intelligent feature deactivates the LED illumination during periods of inactivity, conserving power. The moment the optic detects any motion, it instantly powers on to the last used brightness setting, ensuring your reticle is ready the instant you raise your firearm. This seamless transition provides peace of mind, knowing your sight is always on but never wasting power. The convenient side-mounted battery tray further enhances usability, allowing for quick and easy battery changes without needing to remove the optic from your firearm, thus preserving your zero.

Built to Endure: Uncompromising Durability and Reliability:
For an optic to be truly effective, it must be able to withstand the harsh realities of shooting environments. The Holosun HE403B-GR is constructed from high-strength 6061-T6 aluminum, a material renowned for its excellent strength-to-weight ratio and corrosion resistance. The housing is further enhanced with a durable MAO (Micro-Arc Oxidation) finish, providing an extra layer of protection against wear, abrasion, and the elements. This optic is rigorously designed to be waterproof, ensuring it continues to perform even when exposed to rain, splashes, or accidental submersion. Its robust construction also means it is shockproof, capable of handling the recoil from powerful rifle cartridges and resisting impacts from drops or bumps. When you choose the HE403B-GR, you're investing in an optic that’s built to last.

Versatile Mounting Solutions and User-Friendly Controls

The HE403B-GR comes complete with two essential mounting options to cater to various firearm setups and user preferences:

• Lower 1/3 Co-witness Mount (1.63"): This mount height is ideal for most AR-platform rifles and carbines, allowing the 2 MOA green dot to sit above the iron sights while still allowing the iron sights to be visible in the lower third of the optic's window. This provides a crucial backup sighting system.
• Low Mount (0.75"): Perfect for firearms with low-comb heights or those requiring a more compact profile, such as certain shotguns, AK platforms, or pistol caliber carbines where a low mount is preferred for proper cheek weld and sight alignment.

Both mounts are designed for Picatinny rail systems, ensuring broad compatibility with a vast array of firearms on the market. Installation is straightforward, allowing shooters to quickly mount and zero their new optic.

Adjusting the HE403B-GR is intuitive, thanks to its digital buttons located on the top of the unit. These controls allow for easy manipulation of the reticle intensity settings. With 10 daylight brightness settings, you can fine-tune the green dot to be perfectly visible in any ambient light, from overcast skies to direct sunlight. For specialized applications, the optic also features 2 night vision compatible settings, ensuring seamless integration with night vision devices for covert operations or low-light training.

Further enhancing its optical performance, the HE403B-GR boasts multi-coated lenses, which reduce glare, maximize light transmission, and provide a clear, crisp sight picture with true color representation. The unlimited eye relief means you can position your eye at any comfortable distance from the optic while still maintaining a full field of view, making it forgiving and fast to use in dynamic shooting scenarios. It is also designed to be parallax-free, which means the reticle will appear to remain stationary relative to the target, regardless of slight head movements, contributing to enhanced accuracy. Windage and elevation adjustments are precise, with 0.5 MOA per click, offering fine-tuning for optimal zeroing at your desired distance. Both adjustments offer a total range of 50 MOA.

Who is the Holosun HE403B-GR For?

This Holosun green dot sight is an excellent choice for a diverse range of users and applications:

• AR-15 and Carbine Owners: Ideal for upgrading your standard iron sights, offering significantly faster target acquisition for sport shooting, tactical drills, or home defense.
• Hunters: The crisp green dot stands out clearly against natural backgrounds, aiding in quick and ethical shot placement on game. Its robust build makes it suitable for demanding outdoor conditions.
• Competitive Shooters (PCC, 3-Gun): The rapid target acquisition, long battery life, and durability make it a reliable partner in fast-paced competitive environments.
• Home Defense Enthusiasts: Simplicity of use, instant-on Shake Awake technology, and clear visibility in varying light conditions make it a dependable choice for critical situations.
• Beginner and Experienced Shooters Alike: Its user-friendly interface and forgiving nature (unlimited eye relief, parallax-free) make it easy for new shooters to learn, while its advanced features satisfy the demands of experienced marksmen.
• Night Vision Users: The two dedicated night vision settings ensure compatibility and optimal performance when paired with NV devices.

Why Choose Holosun? A Legacy of Innovation

Holosun has rapidly established itself as a leader in the optics industry by consistently pushing the boundaries of technology and value. The brand is renowned for introducing features like extended battery life, solar fail-safe systems (though not on this specific model, it speaks to their innovation), and Shake Awake technology, which have become industry benchmarks. Holosun products are a testament to meticulous engineering, rigorous testing, and a deep understanding of what shooters need in the field. When you invest in a Holosun optic like the HE403B-GR, you are choosing a product backed by a commitment to reliability, performance, and innovation that directly translates to improved shooting experiences.

Maximizing Your HE403B-GR Experience

To get the most out of your Holosun HE403B-GR, consider the following:

• Proper Mounting: Ensure the optic is securely mounted to your Picatinny rail. Use a torque wrench to tighten the mount screws to the manufacturer’s recommended specifications to prevent shifting under recoil and maintain zero.
• Zeroing Your Optic: Take the time to properly zero your optic at your preferred distance (e.g., 25 yards, 50 yards, or 100 yards). Start close to ensure you're on paper, then move to your desired zero distance, making precise 0.5 MOA adjustments until your point of aim matches your point of impact.
• Brightness Settings: Experiment with the 10 daylight and 2 night vision settings to find the optimal brightness for your environment. A dot that's too bright can cause blooming and obscure your target, while a dot that's too dim will be difficult to see.
• Battery Management: While the 50,000-hour battery life is exceptional, it's always wise to keep a spare CR2032 battery with your gear, especially before heading out for a long day at the range or in the field. The side-mounted tray makes replacement a breeze.
• Regular Maintenance: Keep your lenses clean using the included lens cloth and specialized lens cleaning solution. Avoid abrasive materials that could scratch the multi-coated surfaces. Periodically check that all screws are still tight.

The Holosun HE403B-GR Green Dot Sight, UPC 605930624793, stands as a prime example of superior optical engineering. It's designed not just to sit atop your firearm, but to seamlessly integrate into your shooting process, enhancing your ability to acquire targets quickly, shoot accurately, and operate confidently in any condition. Its combination of a vivid green 2 MOA reticle, industry-leading battery life with Shake Awake technology, and a rugged 6061-T6 aluminum housing makes it an indispensable tool for serious shooters. When looking for an optic that delivers on its promises of performance and durability, the Holosun HE403B-GR from DEGuns is an exceptional choice.

Holosun HE403B-GR Key Specifications

Feature	Detail
Brand / Model	Holosun HE403B-GR
Magnification	1x
Reticle	2 MOA Green Dot
Optic Coating	Multi-Coated
Eye Relief	Unlimited
Parallax	Parallax Free
Tube Diameter	20mm (Objective 20mm)
Wavelength	540nM
Material	6061-T6 Aluminum
Finish	MAO Black Anodized
Firearm Type	Rifle / Carbine
Mount Type	Picatinny Rail
Mounts Incl.	Lower 1/3 Co-witness (1.63"), Low (.75")
Adjustment	0.5 MOA per Click
Windage Adj.	50 MOA Total
Elevation Adj.	50 MOA Total
Brightness	10 Day / 2 NV
Battery Type	CR2032 (Side Tray)
Battery Life	50,000 hrs (Setting 6)
Controls	Top Mounted Digital Buttons
Sensor	Shake Awake Sensor
Waterproof	Yes
Weight	2.82 oz
Length	2.45"
Height	1.60"
Width	1.43"
Includes	Mounts, Battery, T10 L Key, Manual, Lens Cloth, Rubber Cover
SKU / UPC	HE403BGR / 605930624793