5 Best Optics for FN P90

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I’ve had the opportunity to extensively test and analyze various red dot sights on one of my go-to firearms, the FN P90

With its unique design and distinct shooting mechanics, the FN P90 requires a red dot sight that can not only match but enhance its performance. 

Through rigorous field testing, range time, and under varying conditions, I’ve gained invaluable insights into which sights work best with this exceptional weapon. 

Let’s look at some of the best optics for FN P90.

FN P90 red dotCategoryPrice
Trijicon SROBest Overall$544.00
Trijicon RMRSecond Best$499.99
Burris FastFireBest Value for money$144.50
Holosun HS403RHigh Performance$154.44
Holosun 407CBest Budget Alternative of Trijicon$244.99
AimPoint Micro T-2Best Premium Sight$902.00

Top 6 Best FN P90 Red Dot

1. Trijicon SRO – Best Overall

Trijicon SRO Sight Adjustable LED 2.5 MOA Red Dot, Black
  • LARGE, UNOBSTRUCTIVE FIELD OF VIEW: Parallax-free and...
  • CLEAR, CRISP DOT: Fine-tuned, illuminated reticle,...
  • RED DOT PISTOL READY: Designed to fit on many of the...
  • SAME FOOTPRINT AS RMR: Mounts easily using the same...

The Trijicon SRO is a cutting-edge red dot sight designed for precision, ease of use, and rugged durability.

Large, Unobstructed Field of View: One of the main attractions of the Trijicon SRO is its large, unobstructed field of view. 

The sight design minimizes any frame obstruction, allowing for quicker target acquisition and a broader awareness of your surroundings. In layman’s terms, you see more of what’s in front of you, and you see it fast!

Clear, Crisp Dot: The SRO is equipped with a super clear front lens and an illuminated reticle that provides a crisp 2.5 MOA Red Dot. 

The clarity of this dot ensures you don’t have to struggle with target alignment, making your shooting experience not just easier but more accurate.

Easy, Adjustable Windage & Elevation: The windage and elevation adjustments on the SRO are tool-less. Yeah, you heard that right, tool-less! Forget fumbling around with tiny Allen wrenches or flat-head screwdrivers. 

This feature allows you to zero in your sight without the hassle of additional tools. You can make adjustments on the fly, allowing for greater accuracy and a better shooting experience.

Parallax-Free: Being parallax-free, the Trijicon SRO eliminates the need for centering, giving you a more straightforward aiming experience. 

This feature is particularly beneficial when shooting at moving targets or when you’re in a dynamic environment where you have to switch between targets quickly. 

Durability & Ruggedness: Don’t let its sleek design fool you; this sight is built like a tank. It can withstand recoil from powerful pistols and functions reliably in extreme conditions, from dust storms to rain showers. It’s a sight you can rely on when things get tough.

Why I Love It: What’s not to love? The Trijicon SRO combines exceptional clarity with an expansive field of view and easy, tool-less adjustments. These features make it an unbeatable choice for anyone serious about upping their shooting game.

My Experience 

Using the Trijicon SRO on my FN P90 was nothing short of a revelation. The wide field of view made target acquisition almost instinctive, and the clear, crisp dot improved my accuracy noticeably. Every shot felt more confident, and the ease of adjustments meant I could focus more on the shooting and less on fiddling with the sight.


  • Expansive, clear field of view
  • Crisp 2.5 MOA Red Dot
  • Tool-less windage and elevation adjustments
  • Parallax-free
  • Rugged and durable


  • A bit on the expensive side

2. Trijicon RMR – Second Best

Trijicon RM06-C-700672 RMR Type 2 Adjustable LED Sight, 3.25 MOA Red Dot Reticle, Black
  • 3.25 MOA ADJUSTABLE LED RMR: Features an automatic...
  • UNIQUE PATENTED HOUSING SHAPE: Military-grade aluminum...
  • BATTERY CONSERVATION MODE: Automatically adjusts aiming...
  • BUTTON LOCKOUT: Sets RMR into automatic mode to prevent...

The Trijicon RMR is a red dot sight that offers a balance of durability and accuracy, perfect for FN P90 owners who want to up their game.

Adjustable LED Brightness: One of the first things you’ll notice about the Trijicon RMR is its adjustable LED brightness. What does this mean in practical terms? You get 8 different brightness settings and an additional auto mode. 

Trust me, this feature is a game-changer. In fluctuating light conditions, say, from a cloudy sky to sudden sunlight, the sight adapts. I found this incredibly useful during my field tests. 

You don’t have to squint or guess; the dot is always there, crystal clear for you to take that perfect shot.

3.25 MOA Dot Size: I can’t stress enough how the 3.25 MOA dot size distinguishes this sight. In a world where red dot sizes can vary greatly, the RMR takes a balanced approach. 

It’s not too large to overwhelm the target, nor is it too small to get lost in the view. When I tested it at long ranges, I could easily pinpoint my target without any ambiguity. 

Rugged Construction: Alright, let’s talk durability. The RMR is designed like a tank. The aluminum housing offers a kind of resilience that gives you confidence to take it anywhere. 

It’s also waterproof up to 20 meters, so you can forget about moisture wreaking havoc. On my FN P90, it handled recoil like a champ. 

Long Battery Life: Battery life is often an afterthought until you find yourself in a situation where your sight dies on you. Not with the RMR. 

This bad boy comes with a CR2032 cell battery that promises up to four years of life in a moderate setting. 

Auto Illumination Mode: The auto illumination mode on the RMR is like the cherry on top. It reads the ambient light conditions and adjusts the brightness accordingly. 

It’s another layer of user-friendly design that Trijicon has added, making the sight versatile across different lighting conditions. 

Why I Love It: The Trijicon RMR elevates the shooting experience by combining durability, precision, and ease of use. Its intuitive features, like adjustable LED brightness and auto illumination mode, make it stand out. 

My Experience

From the first time I mounted the RMR on my FN P90, I felt like I was dealing with something extraordinary. The sight has consistently performed above expectations during all my field tests.


  • Versatile brightness settings
  • Balanced 3.25 MOA dot size
  • Extremely durable construction
  • Long-lasting battery life
  • Easy installation


  • A bit on the expensive side
  • Auto brightness might not suit everyone’s preference

Trijicon RMR Vs SRO

3. Burris FastFire – Best Value for money

Burris 300234 Fastfire III with Picatinny Mount 3 MOA Sight (Black)
  • Picatinny mount included
  • Windage and elevation adjustments that don't require a...
  • Three levels of brightness
  • 3 MOA Dot Reticle
  • Tool-less wind age and elevation adjustments

The Burris FastFire 3 offers a compact, lightweight red dot sight perfect for rapid target acquisition on submachine guns like the FN P90.

Wide Field of View: One of the standout features of the Burris FastFire 3 is its wide field of view. When you’re out there, every millisecond counts. 

That’s where this sight shines. Its expansive field of view allows you to maintain a broad visual on your surroundings, making target tracking remarkably smooth. 

This wide-field means you don’t have to squint through a tiny window; you see more, and you see it quickly. 

Adjustable Brightness: You know how lighting can be unpredictable out in the field, right? The FastFire 3’s adjustable brightness is a lifesaver. 

You’ve got three manual brightness settings to pick from. And, if you’re more of a hands-off kind of person, the sight automatically adjusts its brightness to match environmental conditions. 

Robust Construction: Let’s talk about durability. Made with metal construction, the FastFire 3 isn’t just for show; it’s designed to last. From the precision-ground lenses to its polished geometries, everything screams quality. 

3 MOA Red Dot for Quick Target Acquisition: You’ve got a 3 MOA red dot that makes acquiring your target quick and easy. What does that mean in practical terms? That red dot is big enough to catch your eye instantly but small enough for precise shots. 

It’s this balance that makes the FastFire 3 a versatile sight for various shooting applications, from up-close tactical scenarios to medium-range engagements.

Why I Love It: Look, what’s not to love? The FastFire 3 is a compact, lightweight, and highly reliable sight. Its features, like the wide field of view and adjustable brightness, make it versatile for any lighting conditions. 

It’s also incredibly user-friendly, with tool-less adjustments and easy mounting. It feels like Burris took everything a shooter could ask for in a red dot sight and packed it into this small but mighty package.

My Experience

I’ve had the pleasure of running this sight on my FN P90, and let me tell you, it’s a game-changer. Whether I was in a rapid engagement scenario or taking precise shots, the FastFire 3 never let me down. The wide field of view and crisp red dot made target acquisition almost effortless.


  • Wide field of view
  • Adjustable brightness with an auto mode
  • Robust metal construction
  • Easy, tool-less adjustments
  • Versatile 3 MOA red dot
  • Lightweight


  • Not rugged enough to handle extremely heavy recoil

4. Holosun HS403R – High Performance

HOLOSUN - HS403R Micro Reflex Red Dot Sight 2 MOA
  • MICRO RED DOT SIGHT: The HS403R is a 20mm micro optical...
  • LONG BATTERY LIFE: The HS403R optic uses a high...
  • MULTI-COATED LENS: Holosun’s optics are manufactured...
  • PARALLAX-FREE: When the red dot is on the target, so...
  • SUPER LED: Holosun Super LEDs provide a versatile range...

The HOLOSUN HS403R is a 20mm micro-sight packed with features like a Rotary switch, Super-LED technology, and a 2 MOA red dot, designed for versatile rifle and carbine applications.

Rotary Switch for Reticle Intensity: Do you want customization? You got it. The HOLOSUN HS403R comes with a Rotary switch, letting you choose between 12 different reticle intensity settings. 

This feature is perfect for adjusting to different lighting conditions or your own visual comfort. Simply rotate the switch to find the level that’s just right for you. 

Multilayer Reflective Glass: When it comes to optics, clarity is king. The HOLOSUN HS403R uses high-quality glass lenses treated with multilayer coatings. These coatings ensure maximum light transmission while reducing glare. 

Super LED Technology: What sets this sight apart is its Super LED technology, giving you not just a red dot but also green and gold options. This color variety allows for customization to your environment or even personal preferences, including considerations for red/green color blindness. 

Super LED technology also means ultra-efficient power usage, extending your battery life up to an incredible 50,000 hours.

Why I Love It: There’s a lot to love about the HOLOSUN HS403R. Its feature-rich design offers versatility and durability, from the Rotary switch to the robust aluminum housing. 

Add the Super LED technology and long-lasting battery life, and it’s a sight that checks almost every box. It’s like HOLOSUN thought of everything a shooter would want and rolled it into this compact package.

My Experience

My time using the HS403R on my FN P90 has been nothing short of impressive. The Rotary switch for reticle intensity and the multiple LED color options make it adaptable for every situation I’ve encountered. The sight holds zero well and provides a clean, clear sight picture.


  • Rotary switch with 12 reticle intensity settings
  • Durable cast aluminum housing
  • High-quality multilayer reflective glass
  • Multiple LED color options
  • Long battery life
  • Wide adjustment range for windage and elevation


  • Red flare on the lens from the red dot
  • Some blurriness due to less-than-perfect lens grinding

5. Holosun 407C – Best Budget Alternative of Trijicon

HOLOSUN HS407C X2 Red 2 MOA Dot Open Reflex Sight - Durable Shake-Awake Solar Failsafe Parallax-Free Aluminum Pistol Sight for Full-Sized Handguns
  • HOLOSUN RED DOT SIGHT - The HS407C X2 is an open reflex...
  • HIGH PERFORMANCE - The HS407C X2 pistol sight features...
  • SHAKE AWAKE TECHNOLOGY - Extends battery life by...
  • SOLAR FAILSAFE - If your battery fails, this red dot...
  • SPECIFICATION - Reticle: Red 2MOA Dot Light Wavelength:...

The Holosun HS407C X2 is an open reflex sight designed for full-sized pistols, offering a large field of view and features like Lock Mode and Solar Failsafe.

Large Field of View for Quick Target Acquisition: The Holosun HS407C X2 shines when it comes to providing a large field of view. With this feature, aiming becomes a much easier task. 

The sight allows you to acquire targets quickly and enhance your shooting accuracy. Whether you’re in a tactical situation or you’re plinking cans in the backyard, the large viewing window ensures you can easily line up your shots without feeling confined. 

The openness of the reflex sight lends itself to quicker and more accurate shooting, a real game-changer for those looking to up their skill set.

Lock Mode for Inadvertent Setting Changes: Nobody likes to fumble around with settings when the action heats up. That’s where Lock Mode comes in. This feature essentially locks the buttons on the sight to prevent any accidental changes to your settings. 

Solar Failsafe: A battery dying out on you can be a buzzkill. Fortunately, the HS407C X2 comes with a Solar Failsafe feature. 

In Auto Mode, the reticle adjusts its brightness based on the lighting conditions, drawing power from natural or artificial light sources when your battery is low. This dual-power system assures that you’re never left in the dark.

Why I Love It: The Holosun HS407C X2 packs a punch with its array of features, from the large field of view to the Solar Failsafe. What really hooks me is the attention to detail, such as the Lock Mode that ensures your settings remain as you’ve configured them. 

It’s evident that Holosun took user experience into consideration when designing this sight. Combine that with its robust 7075 T6 Aluminum housing, and you’ve got a sight that’s as durable as it is functional.

My Experience

Using the Holosun HS407C X2 on my FN P90 has been a rewarding experience. The sight performs exceptionally well, whether I’m at the range or engaging in tactical exercises. The Lock Mode and Shake Awake feature give a sense of reliability that’s indispensable in high-stress situations.


  • Large field of view for easier target acquisition
  • Lock Mode prevents accidental setting changes
  • Shake Awake technology conserves battery life
  • Solar Failsafe for backup power
  • Durable 7075 T6 Aluminum housing
  • Long battery life with convenient side-mounted tray
  • Wide range of brightness settings


  • The dot could be brighter
  • Difficulty in finding the dot initially (may require calibration)

6. AimPoint Micro T-2 – Best Premium Sight

Aimpoint Micro T-2 Red Dot Reflex Sight with Standard Mount - 2 MOA - 200170
  • Features advanced lens system for better light...
  • Features 2 MOA red dot for accurate target engagement...
  • Includes front and rear plastic flip cap lens covers,...
  • Features 12 brightness settings including one extra...
  • Up to 50,000 hours (over 5 years) of constant operation...

The Aimpoint Micro T-2 is a lightweight, high-impact red dot sight with advanced lens systems and multiple brightness settings, making it ideal for diverse lighting conditions.

Advanced Lens System for Light Transmission: The Aimpoint Micro T-2 comes equipped with an advanced lens system that sets it apart from its competitors. 

This lens system allows for superior light transmission, which is crucial in low-light scenarios. Whether you’re in the woods at dawn or engaging in a twilight shooting session, the Micro T-2 assures you won’t be grappling with visibility issues. 

The optical clarity offered by this advanced lens system makes it a robust choice for those who refuse to compromise on visibility. This feature makes the sight versatile enough for any lighting condition, elevating your shooting experience considerably.

2 MOA Red Dot for Target Engagement: The Micro T-2 features a 2 MOA red dot, delivering precise and accurate targeting at all distances. 

Whether you’re taking close-range shots or aiming at a distant target, the 2 MOA red dot ensures your shots are on point. You’re not just looking at a generic red dot; you’re looking at a finely-tuned optical instrument that has been engineered to provide bullet drop compensation at various ranges. 

Reinforced Windage and Elevation Turrets: Adjustments are a part of life when you’re aiming to shoot with precision. The Aimpoint Micro T-2 has you covered with its reinforced windage and elevation turrets. 

These turrets are designed to withstand the wear and tear of consistent adjustments. They offer tactile feedback and are reliable for keeping your sight zeroed in, even after extensive use or in rugged conditions.

12 Brightness Settings: With 12 brightness settings, including an extra-bright setting for intense sunlight, the Aimpoint Micro T-2 ensures that you’re prepared for any lighting environment. 

Each setting is designed to offer optimal visibility, allowing you to easily switch between them as you transition from one lighting condition to another. The extra-bright setting is a standout feature for those bright, sunny days, giving you an edge where other sights may fall short.

Extended Battery Life: Let’s talk about longevity. The Aimpoint Micro T-2 offers up to 50,000 hours of operation from a single CR2032 battery. 

That translates to over 5 years of constant use! Battery life this long means you won’t be fumbling to change batteries in the middle of a shooting session or during crucial moments in the field.

Flip Cap Lens Covers: The sight also comes with front and rear plastic flip cap lens covers. These covers provide an extra layer of protection for the lens, safeguarding against dirt, smudges, and minor impacts. So, rest easy knowing that your lens will remain clean and intact, even in challenging conditions.

Why I Love It: The Aimpoint Micro T-2 is more than just a sight; it’s an extension of my FN P90. From the advanced lens system to the reinforced turrets, each feature adds layers of functionality and reliability. 

My Experience

Using the Aimpoint Micro T2 on my FN P90 has been nothing short of amazing. The sight adapts to various scenarios, be it tactical or leisure shooting. It has stood up to the test in every way, from its optical clarity to its sturdy build.


  • Unmatched optical clarity through advanced lens system
  • Accurate 2 MOA red dot
  • Durable windage and elevation turrets
  • Wide range of brightness settings
  • Exceptional battery life
  • Protective flip cap lens covers


  • Pricey, not suitable for every budget

Final Verdict

Alright, after thorough testing and analysis of six fantastic red dot sights for the FN P90, the dust has settled. Every sight had its own advantages, whether it was value for money, high performance, or being a budget-friendly alternative to a premium sight. 

However, one emerged as the clear winner in my eyes: the Trijicon SRO. It hits that sweet spot where quality meets performance, and it’s my top choice for the FN P90. 

Remember, the best sight for you will depend on your individual needs and preferences. 


Is the FN P90 worth it?

Yes, the FN P90 is worth it but keep in mind the ammo can be costly.

Which is better, P90 or MP7?

The P90 has a higher rate of fire and better armor penetration than the MP7.

Who is the competitor of FN P90?

The main competitor of the FN P90 is the MP7, developed by Heckler & Koch.

Is a PS90 good for self-defense?

The PS90, a civilian version of the P90, can be a reasonable home defense weapon.

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I'm Micheal, an avid shooter and hunting enthusiast from Texas. I'm a recreational shooter who loves to spend time at the range and enjoy learning about new firearms and gears. I love to write about guns and share my passion for shooting with others.

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