Choosing the best red dot sight for your 5.7x28mm firearm can make a significant difference in your shooting experience.
The 5.7x28mm cartridge, known for its high velocity and flat trajectory, is used in popular firearms like the FN Five-seveN pistol and the FN P90. A quality red dot sight can enhance your accuracy, target acquisition speed, and overall shooting performance.
In this article, I’ll review some of the top red dot sights for 5.7x28mm firearms, highlighting their specifications, best features, pros, cons, and user experiences.
I’ll also provide insights on how to choose the best red dot sight for your needs and answer some frequently asked questions.
Top Product List
Top 6 Best Red Dot For 5.7x28mm in 2025 You Should Own
1. Trijicon RMR Type 2
Specifications:
- Reticle: 3.25 MOA Red Dot
- Battery Life: Up to 4 years
- Adjustment: 1 MOA per click
- Material: Aluminum
- Weight: 1.2 ounces
Best Features: The Trijicon RMR Type 2 is known for its rugged construction and reliability. It features an auto-adjusting brightness mode and is waterproof up to 20 meters. The 3.25 MOA dot is ideal for quick target acquisition and precise aiming.
Pros:
- Durable and robust design
- Long battery life
- Auto-adjusting brightness
- Easy to zero
Cons:
- Expensive
- Slightly bulky for some users
Experience: Using the Trijicon RMR Type 2 on my FN Five-seveN was a game-changer. The sight held zero perfectly, even after hundreds of rounds. The auto-adjusting brightness feature worked flawlessly in varying lighting conditions.
Customer Comments: Many users praise its durability and reliability, noting that it performs well under harsh conditions. Some mention the higher price point but agree that the quality justifies the cost.
Fit for 5.7x28mm: The robust build and precise 3.25 MOA dot make it an excellent choice for the high-velocity 5.7x28mm cartridge, ensuring consistent performance and accuracy.
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2. Vortex Venom
Specifications:
- Reticle: 3 MOA Red Dot
- Battery Life: Up to 150 hours on highest setting
- Adjustment: 1 MOA per click
- Material: Aluminum
- Weight: 1.1 ounces
Best Features: The Vortex Venom offers a crisp 3 MOA red dot and features 10 brightness levels. Its top-load battery compartment makes changing batteries easy without removing the sight. The Venom is also known for its clear optics and affordable price.
Pros:
- Affordable
- Clear optics
- Easy battery replacement
- Multiple brightness levels
Cons:
- Shorter battery life on high settings
- Slightly larger profile
Experience: Mounting the Vortex Venom on my FN PS90 was straightforward, and the sight performed admirably at the range. The dot was crisp and easy to see, even in bright sunlight. The top-load battery compartment is a convenient feature.
Customer Comments: Users appreciate its affordability and clear optics. Some have mentioned the shorter battery life at higher brightness settings, but overall satisfaction is high.
Fit for 5.7x28mm: The Vortex Venom’s clear optics and reliable performance make it a great match for the 5.7x28mm cartridge, providing quick target acquisition and accuracy.
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3. Holosun HS507C X2
Specifications:
- Reticle: 2 MOA Dot & 32 MOA Circle
- Battery Life: Up to 50,000 hours
- Adjustment: 1 MOA per click
- Material: Aluminum
- Weight: 1.5 ounces
Best Features: The Holosun HS507C X2 offers multiple reticle options and a solar failsafe feature that extends battery life. It also features Shake Awake technology, which activates the sight when it senses motion.
Pros:
- Long battery life
- Multiple reticle options
- Solar failsafe
- Shake Awake technology
Cons:
- Slightly heavier
- Complex reticle options can be confusing
Experience: The Holosun HS507C X2’s reticle options provided versatility at the range. I found the 2 MOA dot perfect for precision, while the 32 MOA circle aided in rapid target acquisition. The Shake Awake feature is convenient, ensuring the sight is always ready.
Customer Comments: Users love the battery life and versatility of the reticle options. Some find the multiple reticle choices a bit overwhelming, but the overall performance is highly praised.
Fit for 5.7x28mm: The combination of long battery life, versatile reticle options, and robust construction makes it an excellent choice for 5.7x28mm firearms, enhancing both precision and speed.
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4. Leupold DeltaPoint Pro
Specifications:
- Reticle: 2.5 MOA Red Dot
- Battery Life: Up to 300 hours
- Adjustment: 1 MOA per click
- Material: Aluminum
- Weight: 1.9 ounces
Best Features: The Leupold DeltaPoint Pro is renowned for its crystal-clear glass and rugged design. It features a motion sensor technology that activates the sight when it detects movement, and its tool-less, spring-actuated battery compartment makes changes quick and easy.
Pros:
- Clear and bright optics
- Durable construction
- Motion sensor activation
- Easy battery changes
Cons:
- Heavier than some competitors
- Shorter battery life
Experience: The DeltaPoint Pro provided exceptional clarity and a bright reticle. Mounting it on my FN Five-seveN, I was impressed by its performance in various lighting conditions. The motion sensor technology worked reliably, ensuring the sight was ready when needed.
Customer Comments: Customers appreciate the clear optics and durability. Some have mentioned the weight and battery life as minor drawbacks but still highly recommend it for its performance.
Fit for 5.7x28mm: The clarity and durability of the DeltaPoint Pro make it a perfect match for the 5.7x28mm cartridge, offering reliable performance and precise aiming.
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5. Sig Sauer Romeo5
Specifications:
- Reticle: 2 MOA Red Dot
- Battery Life: Up to 40,000 hours
- Adjustment: 0.5 MOA per click
- Material: Aluminum
- Weight: 5.1 ounces
Best Features: The Sig Sauer Romeo5 features a 2 MOA red dot with 10 illumination settings (8 daylight, 2 NV). Its MOTAC (Motion Activated Illumination) conserves battery life by powering up when it senses motion and shutting down when it does not.
Pros:
- Long battery life
- MOTAC technology
- Affordable
- Multiple brightness settings
Cons:
- Heavier than other options
- Limited to 2 MOA reticle
Experience: The Romeo5 was easy to mount and offered a bright and clear reticle. The MOTAC feature ensured the sight was always ready, and the multiple brightness settings allowed for adaptability in different lighting conditions.
Customer Comments: Users appreciate the affordability and long battery life. The MOTAC feature is a favorite, although some mention the weight as a potential downside.
Fit for 5.7x28mm: The Sig Sauer Romeo5’s long battery life and reliable performance make it a solid choice for the 5.7x28mm, ensuring consistent accuracy and ease of use.
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6. Burris FastFire III
Specifications:
- Reticle: 3 MOA or 8 MOA Red Dot
- Battery Life: Up to 5,000 hours
- Adjustment: 1 MOA per click
- Material: Aluminum
- Weight: 1.5 ounces
Best Features: The Burris FastFire III offers a choice between a 3 MOA and 8 MOA red dot. It features automatic brightness adjustment and a top-loading battery compartment for easy changes.
Pros:
- Choice of reticle size
- Automatic brightness adjustment
- Affordable
- Easy battery replacement
Cons:
- Shorter battery life
- Less durable than premium models
Experience: I tested the FastFire III with the 3 MOA dot on my FN P90. The sight provided quick target acquisition and held zero well. The automatic brightness adjustment worked effectively in changing light conditions.
Customer Comments: Users enjoy the reticle options and automatic brightness feature. Some mention the shorter battery life but still find it a great value for the price.
Fit for 5.7x28mm: The versatility and affordability of the Burris FastFire III make it a practical choice for 5.7x28mm firearms, offering quick target acquisition and reliability.
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How to Choose the Best Red Dot Sight for 5.7x28mm?
When selecting a red dot sight for your 5.7x28mm firearm, consider the following factors:
- Reticle Size: A smaller MOA dot (e.g., 2–3 MOA) offers more precision, while a larger dot (e.g.,8 MOA) is faster for close-range shooting.
- Battery Life: Look for sights with long battery life or features like solar power or motion activation to extend usability.
- Durability: Opt for sights made from durable materials like aluminum with waterproof and shockproof features.
- Ease of Use: Consider features like automatic brightness adjustment, easy zeroing, and tool-less battery changes for convenience.
- Price and Value: Balance your budget with the features you need. Higher-priced models often offer better durability and advanced features.
FAQs
Q: What is the best reticle size for a red dot sight on a 5.7x28mm firearm?
A: A 2–3 MOA dot size is generally preferred for its balance of precision and speed, suitable for both target shooting and close-range engagements.
Q: How important is battery life in a red dot sight for the 5.7x28mm?
A: Battery life is crucial, especially if you use your firearm regularly. Look for sights with extended battery life or features that conserve power.
Q: Can any red dot sight handle the recoil of a 5.7x28mm firearm?
A: Most quality red dot sights are designed to withstand the recoil of firearms like the FN Five-seveN or FN P90. Ensure the sight is rated for such use.
Conclusion
Choosing the best red dot sight for your 5.7x28mm firearm depends on your specific needs and preferences.
Whether you prioritize durability, battery life, or advanced features like multiple reticle options, there’s a sight on this list that will suit your shooting style.
Evaluate each option based on its specifications and user feedback to make an informed decision that enhances your shooting experience with the 5.7x28mm cartridge.