Best SIG P320 Red Dot: Top 5 List & How To Pick

SIG P320 Red Dots

If you’re a proud owner of a SIG P320, you’re probably wondering about the best red dot sights to pair with your trusty sidearm. After all, installing a red dot sight on your SIG P320 improves shooting accuracy and target acquisition rate over what you normally experience with iron sights.

So, what are the best SIG P320 red dot sights? Well, we at HuntersHalt went out to find the best of the best. We tested each red dot sight and put it through our rating system. In the end, we conclude the Trijicon RMR Type 2 to be the best SIG P320 red dot sight. Still, there are some great alternatives, so sit back and read on!

Why Install A Red Dot Sight On Your SIG P320?

Accuracy and target acquisition rate – that’s why you need to install a red dot sight on your SIG P320. These sights help you lock onto your target faster and with much higher precision than a standard front and rear sight.

I’ve found them to be especially great for new shooters who are still navigating the ropes of aiming. Plus, in low-light conditions, a red dot sight really makes a difference.

Ultimately, it’s all about enhancing your shooting experience and upping your game, whether in a self-defense situation or when you’re stalking a deer.

What Are The Available SIG P320 Optic Cuts?

Sig Sauer has spared no expense in ensuring that there are enough red dot sights compatible with the P320.

Hence, you’ll find a lot of different optic cuts for the SIG P320. The most common is the RMR footprint. Additionally, you also have the Romeo1Pro/Delta Point Pro footprint.

My advice is to first look at RMR-footprint red dot sights before looking at the Delta Point Pro options. They are more popular, so it will be easier to find aftermarket parts.

5 Best SIG P320 Red Dot Sights

The best SIG P320 red dot sights are.

  1. Trijicon RMR Type 2
  2. Trijicon SRO
  3. Sig Sauer Romeo 1 Pro
  4. Holosun HE508T-X2

1. Trijicon RMR Type 2

Our number one pick, the Trijicon RMR Type 2, is a little gem in terms of durability and reliability. It has arguably been the number-one choice for those who demand reliability and precision.

Thanks to its unique bat-eared design that diverts force away from the lens, it can withstand recoil much heavier than the Sig P320s.

It has a super crisp dot – available in 1 MOA, 3.25 AND 6.5 MOA size. My RMR has a 3.25 MOA dot size because of its versatility for both close and medium-range shooting. The RMR also has automatic brightness controls, which makes adjusting lighting as simple as pie! Plus, its CR2023 battery life can last over four years – impressive!

On my SIG P320, the RMR Type 2 felt like it was meant to be there. The sight picture is clear, and the dot is sharp as a tack. It’s like your aim just naturally goes where it needs to be.

The RMR Type 2’s footprint is naturally compatible with red dot-ready SIG P320 models, making installation very straightforward.

Overall, the RMR is the best red dot sight for the SIG P320, and at $731, you’ll be buying a high-quality red dot for a very affordable price.


  • Exceptionally durable.
  • Clear and crisp dot.
  • Easy to adjust.
  • Lightweight design – 1.2 ounces


  • Pricey, but you get what you pay for (value).
  • Battery replacement requires sight removal.

2. Trijicon SRO

Next, we’ve got the Trijicon SRO. It’s like the RMR but with a bigger viewing window and a different design. It has a larger field of view than the RMR, making it easier to track moving targets.

I find the top-loading battery quite favorable, allowing an easier swap between batteries. Although, at a battery life of three years, you’ll hardly need this. The SRO offers the same footprint as the RMR, so it’s naturally compatible with your SIG P320.

It has eight brightness settings and is available in a 1 MOA, 2.5 MOA, and 5 MOA dot. It also has a fairly average weight of 1.6 ounces.

Shooting with the SRO on my SIG P320 was like a dream. The larger window really helps in rapid target engagement. However, I’m not a big fan of the design – it feels like Trijicon slapped a lens on the body and called it a day.

The SRO costs $771, making it slightly more expensive than the RMR.


  • Bigger window for easier aiming.
  • Convenient battery replacement.
  • Excellent build quality.


  • A bit bulkier.
  • Weird design
  • Price tag is on the higher side.

3. Sig Sauer Romeo 1 Pro

What’s a SIG P320 without a SIG Sauer red dot optic? The Romeo 1 PRO has made some headway since first arriving on the scene. It’s much cheaper than its competitors but still offers the same features as other quality red dot optics.

The Romeo Pro 1 is available in a 3 MOA or 6 MOA dot option. It is an incredibly lightweight optic – weighing only 1 ounce. Plus, it has 12 brightness controls, two of which are for night vision-compatible devices.

Furthermore, the Romeo 1 Pro has a battery life of 10,000 hours, which fits well into our minimal battery life requirement for a red dot sight. Unfortunately, the only major downside of this red dot optic is that it uses the Leupold Delta Point Pro footprint, which means you’ll need a different adapter plate from the RMR for the SIG P320.

Even though it requires an adapter plate different from the RMR, the sight still feels like it was tailor-made for the P320. I was amazed by the dot clarity and the balance it brings to the pistol.

Overall, at $489.99, you’ll be investing in a quality red dot sight for your SIG P320.


  • Affordable
  • Excellent battery life.


  • Requires an adapter plate
  • Slightly less rugged compared to some competitors.

4. Holosun HE508T-X2

Holosun has been an innovator in the handgun red dots field. While its name doesn’t carry the same weight as the likes of EOTech and Trijicon, its optics are a force to be reckoned with. The HE508T-X2 is a prime example of this statement.

This red dot sight is a budget-friendly option that doesn’t skimp on features. It offers multiple reticle options (2 MOA x 32 MOA circle dot) and has a solar panel failsafe. Plus, it features Shake Awake technology, extending the battery life to an impressive 50,000 hours.

Now, while it might appear bulky and heavy with its two-ounce weight, it is important to note that this reflex sight is rugged, featuring titanium housing.

On the P320, the sight felt nimble and efficient when I tested it. The solar backup is a cool feature, especially if you’re outdoors a lot. Overall, it provides a comfortable and accurate shooting experience, and at $435.28, it won’t break the bank.


  • Affordable
  • Solar backup
  • Multiple reticle options
  • Naturally compatible with the SIG P320


  • Slightly bulkier design


EOTech is one of the most renowned names in the red dot industry. Their EFLX is an exceptional red dot sight, offering durability and a crystal clear reticle.

It has a compact size and weighs only 1.4 ounces. It also boasts eight brightness settings and a durable design. There are two MOA sizes available – a 3 MOA and a 6 MOA DOT.

Unfortunately, it also utilizes the Leupold Delta Point Pro footprint, so you’ll need an adapter plate if you want to use this reliable sight on your SIG P320.

When I mounted the EFLX on my P320, I couldn’t believe that the EFLX was EOTech’s first venture into the world of reflex sights. This sight offered a balanced shooting experience and felt like an extension of the pistol itself!

If you want a cost-effective reflex sight from a reputable brand, the EFLX at $389 is your best option.


  • Reliable brand
  • Clear and precise reticle
  • Budget-Friendly


  • Adapter plate needed

Which P320 Red Dot Should You Buy?

To decide which P320 red dot you should buy, think of your shooting style and application. Personally, I would go for the Trijicon RMR Type 2, but what works for me might not work for me.

So, consider this: are you into competitive shooting, everyday concealed carry, hunting, or just casual range visits? Also, pay attention to the physical dimensions of the optic (size and weight) as well as additional features like battery life, brightness settings, and durability.

Finally, make sure you buy something that is within your budget. In the end, it’s all about finding that perfect balance for your personal use.

Which P320 Red Dot Sight Is Best For Concealed Carry?

For concealed carry, the Trijicon RMR Type 2 is our top pick. It’s compact, rugged, and won’t catch on your clothing when drawing. All these features ensure quick target acquisition without adding bulk to your existing pistol setup.

Which P320 Red Dot Sight Is Best For Competition Shooting?

In competition shooting, the Trijicon SRO reigns supreme. Its precision and speed, with a wide field of view, make it the winner. It allows for quick target acquisition and a clear view of the target area, giving you that competitive edge.

Which Is The Best Budget Friendly P320 Red Dot Sight?

On a budget – the EOTech EFLX is your best option. It’s a great blend of quality, features, and affordability. Plus, you get the backing of a great and reputable brand when you buy this red dot sight.

How Do We Rate SIG P320 Red Dot Sights?

When we rate SIG P320 red dot sights, we look at durability, user-friendliness, battery life, size, weight, price, and additional features.

The sight needs to be durable enough to withstand intense recoil and exposure to harsh conditions. It should offer a simple mounting platform and easily adjustable controls.

Furthermore, the sight needs to have a battery life of at least 10,000 hours, ensuring reliability. The sight also needs to be compact – not weighing more than 3 ounces.

Finally, it should offer value. Usually, we want a SIG P320 red dot sight to be priced below $1,000 and offer great features to justify the price. You can apply our rating factors to any red dot sight you buy – see it as your red dot sight buying guide.

How Can You Tell Which Optics Are Compatible With P320?

Simply look at the optic cut of your P320 and the footprint of your red dot sight. If they mention the same name, then it means your optics are compatible with your P320.

Always make sure of the red dot footprint before buying a red dot sight. If you’re unsure, a quick check of the manufacturer’s website or a call to customer service can clear up any confusion.

Can SIG P320 & 365 Red Dots Be Interchanged?

Yes, SIG P320 and 365 red dot sights can be interchanged. As long as the SIG P365 red dot uses the same footprint as the optic cut of 365, you can interchange the sight.

Frequently Asked Questions

Do SIG P320's Need A Red Dot Sight?

Is It Worth Getting A Custom Cut Slide On Your SIG P320?

If your optic cut isn't compatible with your red dot sight, then yes, it is worthwhile getting a custom slide on your SIG P320. This allows for more personalization and better sight compatibility.

The Bottom Line

There you have it – the top 5 red dot sights for the SIG P320. While the Trijicon RMR Type 2 is arguably the most suited for the SIG P320, the other red dots still have a lot to offer. Each has its unique flair, but they all promise the advantages you would normally experience when using a red dot sight. In the end, choose a red dot sight that suits your budget and use case!

About the author

Charles Neser

I'm a life long hunter & gun lover. Currently pursuing my Master's Degree (M.Sc.) in Animal Nutrition at University of the Free State.

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