5 Best Red Dot Sight For AR15 With Fixed Front Sight

Having the A2 front sight post in the field of view isn't a bad thing, but it does obscure the shooter's situational awareness a lot. If you can fold it that will be great. If not, here are 5 best red dot sights for AR15 with fixed front sight (FSP) based on field of view, zero retention, lens clarity, reticle type, build quality, durability and cost.

Remember, the most crucial aspect is choosing what works best for you, not solely relying on biased recommendations. A large field of view optic can do the trick, but a good mount height to clear the front sight post is just as important.

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Best Red Dot Sight For AR15 With Front Sight Post

Holosun 515GM - Best Overall

The Holosun 515GM red dot sight is often regarded as the closest competitor to Aimpoint products in terms of durability. It offers several features that contribute to its exceptional ruggedness and long-lasting performance. The field of view is very close to Aimpoint Micro, and when using a 1.93" height optic mount, the A2 fixed front sight won't be so much obscuring target down range.

The Holosun 515GM for AR-15 is also designed to be highly resistant to water, dust, and other environmental elements. It often comes with an IPX7 or IP67 rating, indicating its ability to withstand submersion in water for a certain period without compromising its functionality. This weatherproofing feature allows users to rely on the sight in various weather conditions, including rain and extreme humidity.

Another notable aspect of the Holosun 515GM is its battery life. Many models in the Holosun lineup offer extended battery longevity, some even surpassing the industry standard. This extended battery life ensures that the sight remains operational for extended periods, reducing the need for frequent battery changes and providing increased reliability during critical situations.

Specs

• Magnification - 1X
• Reticle - 2 MOA + 65 MOA Ring
• Adjustment - 0.5 MOA / Click
• Brightness Settings - 10 Days & 2 Night settings
• Battery Life - 50,000 hrs
• Construction - 7075 T6
• Eye Relief - Unlimited
• Submersion - IPX8
• Body Dimension - 2.73" X 1.53" X 1.61"
• Window Size - 1 X 22mm
• Weight - 3.74 oz without mount

Sig Sauer ROMEO 5 - Best For The Money

The Sig Sauer ROMEO 5 stands out as a compact and sturdy red dot sight, designed specifically for AR15 casual shooters. What sets it apart is the innovative MOTAC system, ensuring extended battery life by activating only when in motion. This means you can trust the sight to be ready whenever you need it, as it conserves power when not in use. With its 2 MOA red dot reticle and 8 daylight settings along with 2-night vision settings, precise aiming is made effortless.

Weighing a mere 5.1 ounces, this sight is exceptionally lightweight, making it an ideal choice for those who prioritize mobility and comfort during shooting sessions. Its versatility is further enhanced by its compatibility with various aftermarket Aimpoint Micro mounts, including the likes of Scalarworks 1.93" mount and the Unity Tactical FAST mount. This allows you to customize your firearm setup to your liking, ensuring an optimal shooting experience.

Furthermore, the ROMEO 5 features remarkable durability, being both waterproof and fog-proof, which means you can rely on its consistent performance regardless of the weather conditions. You can rest assured that it will hold up in any environment.

One of the most impressive aspects of this red dot sight is the exceptional battery life it offers. With just a single CR2032 battery, you can expect up to an astounding 40,000 hours of usage. Thanks to the intelligent MOTAC system, the sight powers down when idle, preserving battery power and maximizing its overall lifespan.

Specs

• Magnification - 1X
• Reticle - 2 MOA Dot
• Adjustment - 0.5 MOA / Click
• Mount Footprint - Aimpoint Micro
• Brightness - 8 DL&2 NV (Features MOTAC motion-activated illumination )
• Battery Life - CR2032, 40000 hours with motion activation
• Construction - 6061 T6 housing + Anodized
• Submersion - IPX7
• Body Dimension - 62.7mm X 38.1mm X 38.6mm
• Window Size - 1X20mm
• Weight - 5.1 oz

Holosun AEMS - Best Compact Size

One outstanding feature of the Holosun AEMS is its multi-reticle system, which offers three options: a precise single 2 MOA red dot, a dot surrounded by a 65 MOA circle, and a 65 MOA circle without a center dot. These choices cater to different shooting preferences and scenarios.

When it comes to performance, the AEMS doesn't disappoint either. With an impressive battery life of 50,000 hours, it ensures extended usage without worries. Moreover, the sight operates on a standard CR2032 battery and even has solar functionality, providing a reliable power source for various situations.

For those who prefer a taller mount, several aftermarket options are available, but the Scalarworks optic mount stands out as the best so far, enhancing the sight's versatility.

AEMS is not only feature-rich but also smartly designed. The Shake Awake function is a clever addition that automatically activates the sight upon detecting movement, ensuring readiness when it's needed the most.

Specs

• Magnification - 1X
• Reticle - 2 MOA + 65 MOA Ring
• Adjustment - 0.5 MOA / Click
• Brightness Settings - 8 Days & 4 Night settings
• Battery Life - 50,000 hrs
• Construction - 7075 T6
• Eye Relief - Unlimited
• Submersion - IPX8
• Body Dimension - 2.2" X 1.54" X 1.7"
• Window Size - 1.1" X 0.87"
• Weight - 3.9 oz 

Aimpoint Micro T2 - Best Durability

The Aimpoint Micro red dot sight is made with an ultra-strong 7075 T6 aluminum housing and a robust hard anodized surface, this red dot sight is built to withstand the harshest conditions and recoil forces. Its exceptional ruggedness ensures reliability and longevity, making it a top choice for law enforcement, military personnel, and avid shooters.

When considering the hefty price tag of over $780 for the Aimpoint Micro red dot sight, several factors come into play to justify the investment. Firstly, its unparalleled durability guarantees that it will endure rigorous use and last for years, resulting in long-term savings. The weatherproof design, with a fully sealed housing and an IPX7 rating, ensures reliable performance in rainy, muddy, or even submerged conditions.

Moreover, the Aimpoint Micro offers a level of precision and dependability that enhances shooting accuracy. Its advanced optics, coupled with multiple brightness settings for different lighting conditions, provide optimal visibility and targeting. The red dot sight's shockproof construction retains zero, meaning it maintains sight alignment even during rapid-fire or intense recoil situations, allowing shooters to consistently hit their targets.

Specs

• Magnification - 1X
• Reticle - 2 MOA (most popular)
• Adjustment - 0.5 MOA / Click
• Brightness Settings - 12 settings
• Battery Life - 50,000 hrs
• Construction - 7075 T6
• Eye Relief - Unlimited
• Submersion - IP7
• Body Dimension -3.1" X 1.8" X 1.9"
• Window Size - 1.26" X 0.91"
• Weight - 3.3 oz without mount

Trijicon MRO - Best Field Of View

The Trijicon MRO (Miniature Rifle Optic) sets itself apart not just as a top-tier red dot sight for the AR15 but also stands out with its competitive pricing when compared to the Aimpoint Micro.

Constructed from robust 7075 T6 aluminum, the Trijicon MRO shares the same durable build quality as the Aimpoint Micro. However, what truly distinguishes it is the innovative tapered field of view (FOV) design, which eliminates the tube effect. This leads to a significantly larger field of view on an AR15 equipped with a fixed front sight post. Additionally, the top turret design further enhances the field of view, providing excellent visibility on both the left and right sides of the optic.

If you seek a dependable and high-performing red dot sight for your AR15, akin to the Aimpoint Micro, the Trijicon MRO stands as an exceptional option worthy of consideration.

Specs

• Magnification - 1X
• Reticle - 2 MOA
• Adjustment - 0.5 MOA / Click
• Brightness Settings - 8 Days
• Battery Life - 50,000 hrs
• Construction - 7075 T6
• Eye Relief - Unlimited
• Submersion - IPX8
• Body Dimension - 2.6" X 1.7" X 2"
• Window Size - 1X25
• Weight - 4.1 oz without mount