6 Best SIG P320 X5 Legion Red Dot

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My quest for the perfect red dot sight led me to try many contenders, but when I set my eyes on the Trijicon SRO and fitted it on my SIG P320 X5 Legion, it was love at first sight. Literally. 

I have fired countless rounds through various sights, but the Trijicon SRO emerged as the top choice. 

There’s something about the SRO that feels right – a perfect fit, easy to use, and incredibly precise.

The Trijicon SRO is packed with features like a larger window, easier battery access, and three different dot reticle versions, making it the Best SIG P320 X5 Legion Red Dot. 

This article aims to explore what makes the SRO a game changer in the world of specialized reflex optics.

Top 6 Best Red Dot for SIG P320 X5 Legion

1. Trijicon SRO – My Pick

Let me tell you the Trijicon SRO has become a trusted partner for my SIG P320 X5 Legion. Testing this sight in various conditions, what stood out for me was the large glass window that not only gives a little more room at the top to track the dot but also offers a very expansive field of view. 

The 2.5 MOA dot option just feels right for fast and precise shooting. Remembering a day at the range, the top-loading battery feature saved me from any delays, allowing for quick battery changes without needing to remove the optic. 

Now that’s handy! Plus, one CR2032 lasting for around 3 years is impressive. 

Mounting it was no fuss and its durability has repeatedly proven itself. 

Overall, it’s safe to say that the Trijicon SRO is not just a sight; it’s a game-changer for anyone wielding the Sig P320 X5 Legion.

Flaw but not a dealbreaker

If I have to be picky, the price point may be a bit steep for some, but the quality justifies it.

2. Trijicon RMR – Top Quality

When I attached the Trijicon RMR Type 2 to my SIG P320 X5 Legion, I could instantly tell this was something special. The RMR stands for “Ruggedized Miniature Reflex,” and it sure lives up to its name. 

This baby is shockproof and waterproof in up to 66 feet of water; talk about handling anything I throw at it! The patented square-top housing did a tremendous job protecting the lens, even during heavy impacts. 

I was particularly impressed with the 3.25 MOA dot version, which felt just right for quickly acquiring a sight picture yet still offering a fine aiming point for accurate shots. 

The eight brightness settings gave me versatility, and with a CR2032 battery lasting around four years, I never had to worry about it. 

Mounting it onto the X5 Legion was no fuss, and I can’t emphasize enough how durable this red dot is. Simply put, it’s a top-tier option for any serious shooter.

Flaw but not a dealbreaker

The one gripe I have is that the CR2032 is mounted underneath the RMR Type 2, so you must unmount the optic to swap the battery, and rechecking your zero becomes necessary.

3. Leupold DeltaPoint Pro – Strongest Build

Let me tell you about the Leupold Delta Point Pro – a gem of a red dot sight that I’ve had the pleasure to mount on my SIG P320 X5 Legion. 

The best part? No adapter plate is required; straight on the X5 Legion. Now, this sight boasts a robust aluminum housing, and that spring steel shroud around the lens really steps up the protection game. 

I took it through rain and even a drop or two, and it stayed waterproof, shockproof, and fog-proof. What caught my eye was the HUGE sight window, making sight acquisition a snap. 

I leaned toward the 2.5 MOA dot, and those 8 brightness settings were just perfect for any light condition. 

The Motion Sensor Technology that turns off the sight after 5 minutes of inactivity was a neat touch and the top access battery compartment? Game-changer! Battery changes were quick and hassle-free.

Flaw but not a dealbreaker

Though a great sight, the open emitter optic design means pollutants can sneak in and blur your vision, but it’s rarely a major issue.

4. HOLOSUN HS507C X2 – Customers Choice

The Holosun 507C X2 has been quite a journey on my SIG P320 X5 Legion! It’s the price-to-performance ratio that really had me sold on this sight. 

The sturdy aluminum housing kept it safe from accidental bumps and weathered through rain and snow like a champ. What really got me excited was Holosun’s Multiple Reticle System. 

Three choices, folks! That 32 MOA Circle Dot Reticle, though? Pure magic for quick target acquisition, and still precise when you need it. And can you believe it? A single CR1632 battery takes care of you for 5 years, with the Shake Awake tech and a solar panel as backups. 

Battery changes were never a headache, thanks to the side-loading tray. This sight was a pocket-friendly, feature-packed choice that didn’t skimp on quality.

Flaw but not a dealbreaker

The sight’s lens has a slightly bluish tint, but it’s nothing that really hinders the experience.

5. SIG SAUER Romeo 3XL – Exceptional Value

Now let me tell you about the ROMEO3XL. If you’re all about Sig Sauer, like I am, this is the one for your SIG P320 X5 Legion. Its large 1X35mm lens, which is an open emitter reflex optic, gives you the advantage of an easier time tracking the dot, and the quality is something you can feel. 

Stronger and superior to the ROMEO1, this optic stands tall with features like MOTAC and IPX7 waterproofing. But what truly had me singing praises was the large window and the side battery loading tray. 

No need to fumble around with sight removal; just pop in the battery, and you’re ready to go. 

Flaw but not a dealbreaker

The ROMEO3XL does come with a higher price tag, but you know what they say: you get what you pay for.

6. Crimson Trace RAD Pro – Smart Choice

If affordability and innovation are your jams, let’s chat about the Crimson Trace RAD Pro. What drew me to it initially was its reputation as a new and exciting red dot sight, and boy, did it live up to that reputation! 

Mounted on my SIG P320 X5 Legion, this full-size open-reflex Red Dot sight just felt right. Its 3 MOA dot made target acquisition fast, and I could tell that the angles on the sight housing were all about durability. 

This was the real kicker for me about its ambient light sensor. I went from dawn to dusk without adjusting the brightness manually; the sight took care of it! Battery changes are easy with the top access, and the Doctor pattern footprint makes mounting easy. 

This sight matched up with the X5 Legion perfectly and didn’t empty my pockets.

Flaw but not a dealbreaker

The sight hangs slightly higher than expected, but you can get used to it without much fuss.

Conclusion

After diving deep into the various options, it’s clear that the Trijicon SRO stands out as the best red dot sight for the SIG P320 X5 Legion. 

Its unmatched features, durability, and precision make it my top pick. However, every shooter’s needs and preferences differ, so while the SRO might be my choice, others might find a different sight more to their liking. 

All the options reviewed here have their unique characteristics, making them suitable for different users. Ultimately, the final choice should be based on individual needs, preferences, and budget.

FAQs

What optics fit the SIG P320 X5 Legion? 

Optics such as Trijicon SRO, Trijicon RMR, Leupold DeltaPoint Pro, HOLOSUN HS507C X2, SIG SAUER Romeo 3XL, and Crimson Trace RAD Pro.

What red dot goes on a SIG P320? 

The best red dot is the Trijicon SRO.

Is P320 X5 Legion optics Ready? 

Yes, it’s optics-ready with an optics cut.

Will RMR fit on sig X5 legion?

Yes, if the model number ends in R2.

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AUTHOR

Ben has been writing about gun sights for 4 years, and red dot sights are what he loves the most. So, his love for red dot sights makes his job easier.