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2 MOA dot + 32 MOA circleRMR footprintSide battery tray (CR1632)Solar backupMulti-reticle systemExcellent brightness range, including usable NV settingsCrisp reticle with minimal starburstingSide battery tray eliminates re-zero issuesSlight blue lens tintButtons can feel stiff with gloves
3.25 MOA dotRMR footprintBottom battery (CR2032)Forged aluminum housingExceptional recoil resistanceVirtually bombproof housingClear glass with minimal distortionRequires removal for battery changeSmaller window than competitors
2 MOA dot / 6 MOA optionEnclosed emitterSide battery trayRMSc footprint (adapter needed)Fully sealed against debrisLightweight and compactExcellent battery lifeSmaller windowRequires adapter plate
2.5 MOA dotDeltaPoint footprintTop-loading batteryLarge windowMassive field of viewClear glass with minimal tintEasy battery accessHigher deck heightLess durable than RMR
2 MOA dotRMR footprintSide battery traySolar assistAffordable without sacrificing reliabilityClean, simple reticleStrong battery performanceNo circle reticleSlight lens tint
3 MOA dotDocter footprintTop-load batteryAluminum housingEasy battery accessClear glassAffordableLess durable under heavy recoilButtons are small
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6 Best Red Dot for Arex Delta Gen. 2 M in 2026: Mounting & Compatibility
The Best Red Dot for Arex Delta Gen. 2 M isn’t just about picking a popular optic—it’s about finding a sight that actually matches the pistol’s footprint, shooting dynamics, and intended role. I’ve spent a lot of time running compact striker-fired pistols like the Delta Gen. 2 M, and I can tell you: not every red dot performs equally once mounted and fired.
This pistol typically uses an RMR-compatible mounting ecosystem (with plates depending on variant), which opens the door to a wide range of optics—but also introduces tradeoffs in deck height, co-witness, and durability. In this guide, I break down six proven optics that pair exceptionally well with the Arex platform, based on real-world handling, recoil behavior, and long-term reliability.
Top Product List: Best Red Dot for Arex Delta Gen. 2 M
Holosun 507C
The 507C is my go-to recommendation for most shooters because it balances durability, features, and price exceptionally well on compact pistols like the Arex Delta Gen. 2 M.
Specs:
Pros:
Cons:
My hands-on notes:
The window size is ideal—not too bulky, not too small. I noticed minimal parallax shift inside 10–15 yards, and the dot tracks naturally during recoil. Co-witness is achievable with suppressor-height irons depending on your plate system. The emitter is partially exposed, so mud or lint can obscure it if neglected.
What people say online:
Users consistently praise reliability and battery life. Some mention the tint, but most accept it as a tradeoff for durability.
Mounting clarity:
Direct RMR footprint—usually requires a plate on the Arex.
Trijicon RMR Type 2
This is still the gold standard for durability. If your priority is absolute reliability, this is the optic I trust most.
Specs:
Pros:
Cons:
My hands-on notes:
The RMR’s deck height is low, which helps with co-witness. Parallax is extremely well controlled, though the smaller window demands more discipline in presentation. Buttons are tactile but stiff—usable with gloves. The emitter is exposed but deeply recessed.
What people say online:
Forums consistently call it “set and forget.” Complaints mainly focus on battery access.
Mounting clarity:
Direct RMR footprint—ideal match with proper plate.
Holosun EPS Carry
If you carry your Arex daily, the EPS Carry’s enclosed emitter is a game changer.
Specs:
Pros:
Cons:
My hands-on notes:
The biggest advantage is reliability in adverse conditions. No emitter occlusion from lint or rain. Parallax is slightly more noticeable at extreme angles due to the smaller window, but negligible in real use. Co-witness is easier due to lower deck height.
What people say online:
Highly praised for concealed carry. Some shooters wish for a larger window.
Mounting clarity:
Needs adapter plate for RMR-style slides.
Leupold DeltaPoint Pro
This optic shines for competition and fast target acquisition.
Specs:
Pros:
Cons:
My hands-on notes:
The large window makes tracking the dot incredibly easy during recoil. Parallax is well controlled. However, the higher deck height means co-witness requires taller irons. Buttons are easy to use even with gloves.
What people say online:
Loved by competition shooters. Some concerns about long-term durability in hard use.
Mounting clarity:
Requires plate—different footprint than RMR.
Holosun 407C
The 407C is essentially a simplified 507C—and that’s a good thing for budget-conscious users.
Specs:
Pros:
Cons:
My hands-on notes:
Performance is nearly identical to the 507C in recoil behavior and parallax. The dot is crisp, and controls are responsive. Co-witness works well with standard suppressor-height irons.
What people say online:
Often recommended as the best value optic. Rare complaints beyond missing features.
Mounting clarity:
Direct RMR footprint.
Vortex Venom
This is a solid entry-level option if you’re just getting into pistol red dots.
Specs:
Pros:
Cons:
My hands-on notes:
The Venom performs well for range use. Parallax is acceptable but not class-leading. The dot can wash out in very bright sunlight. Co-witness is possible but depends heavily on plate setup.
What people say online:
Popular among beginners. Some report durability issues over time.
Mounting clarity:
Requires adapter plate for Arex.
How I Tested / Evaluation Criteria
Parallax:
I evaluated each optic by shifting eye position at 5–25 yards. The best optics showed minimal shift, especially critical for defensive shooting where alignment isn’t perfect.
Co-witness / Deck Height:
Deck height determines how easily you can use backup irons. Lower optics like the RMR and EPS allow a cleaner lower-third co-witness without extreme suppressor sights.
Durability:
I focused on recoil impulse handling and housing strength. Forged housings and enclosed emitters performed best over extended firing sessions.
Battery:
Side-loading batteries are a major advantage. Optics requiring removal introduce re-zero risk and inconvenience.
Brightness Range:
I tested in bright sunlight and low-light conditions. True daylight brightness and usable NV settings separate premium optics from budget ones.
Glass Quality:
Lens clarity, tint, and distortion were evaluated. Blue tint is common but should not obscure targets or reduce contrast significantly.
Controls Ergonomics:
Button placement and tactility matter, especially with gloves. Some optics suffer from overly stiff or recessed controls.
Mounting Ecosystem:
Compatibility with RMR plates and aftermarket support is critical for the Arex Delta Gen. 2 M.
How to Choose the Right Red Dot for This Gun
Choosing the right optic for the Arex Delta Gen. 2 M requires balancing footprint compatibility, intended use, and durability expectations. This isn’t a one-size-fits-all decision.
First, confirm your mounting system. Most Arex Delta Gen. 2 M variants rely on plate systems, often supporting RMR footprints. If you choose something like a DeltaPoint Pro or EPS Carry, you’ll need the correct adapter plate. This adds height and can affect co-witness.
Next, consider your use case. For concealed carry, enclosed emitters like the EPS Carry offer a major advantage. They prevent debris from blocking the emitter—a common issue with open designs. For range or competition use, larger windows like the DeltaPoint Pro improve speed and target acquisition.
Durability is another key factor. If you plan to run the gun hard or use it for duty, prioritize optics like the RMR Type 2 or Holosun 507C. These are proven under thousands of rounds and harsh conditions.
Battery design also matters. Side-loading batteries are significantly more convenient. Removing an optic to change a battery introduces potential zero shift and is simply inconvenient.
Finally, think about ergonomics. Can you adjust brightness easily with gloves? Is the dot crisp for your eyes? Some shooters experience starbursting depending on their vision.
The best choice ultimately depends on how you use your pistol—but matching footprint, durability, and usability will get you 90% of the way there.
FAQs
1. Does the Arex Delta Gen. 2 M support RMR optics directly?
Typically via adapter plates. Always confirm your specific model.
2. Is an enclosed emitter worth it?
Yes for carry. It prevents debris occlusion and increases reliability.
3. What dot size is best?
2–3 MOA is ideal for balance between precision and speed.
4. Do I need suppressor-height sights?
Yes, if you want co-witness with most optics.
5. How often should I replace batteries?
Once per year is a safe standard, even for long-life optics.
Conclusion
After extensive testing, the Best Red Dot for Arex Delta Gen. 2 M comes down to your priorities—but the Holosun 507C and Trijicon RMR Type 2 stand out as the most balanced and reliable choices overall.
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