Best Red Dot For Sig P320 – Reviews w/FAQs

Hey shooters! Welcome to my review of the best red dot for sig p320 in 2023!

The Sig Sauer P320 Compact is an excellent choice for those who want the ease of semi Auto strike fire but still love shooting 9mm. With its crisp and smooth trigger pull, you will be able to get more accuracy in every shot.

Do you own a Sig P320? If so, then you’re probably on the lookout for the best red dots for your sig p320.

In this guide, I am going to review some of the best red dots on the market that I have researched and tested for months on my sig p320 handgun to help you decide which one is right for you.

For me, the best overall p320 red dot is the Leupold DeltaPoint Pro Reflex Sight. But I have also reviewed other red dots for you to choose from.

I have ranked these red dots based on reliability, value for money, performance, and durability. So, you can pick one according to your needs.

Top 5 Best Red Dot Sights for P320

Key Features
Leupold DeltaPoint Pro
Battery saving Motion Sensor
Diamond Coat Aspheric Lens
scratch resistant
tool-less battery access
100% waterproof construction 
Vortex Optics Viper
low-profile making
ultra-clear lens
unobstructed field of view
Armortek coatings lens
Hard anodized finish
Waterproof and shockproof
Sig Sauer Romeo 1 Pro
superior light transmittance
Lockless Zeroing System
return to zero
multiple brightness settings
Motion Activated Illumination System
Trijicon SRO Sight
Unobstructive field of view
Crisp Dot
hassle-free zeroing
Same Footprint Aa RMR
Burris FastFire III
Pinpoint Accuracy
3 MOA dot
Shockproof design 
highly durable and shockproof

1. Leupold DeltaPoint Pro Reflex Sight

Leupold DeltaPoint Pro Reflex Sight
Leupold DeltaPoint Pro Reflex Sight (Image credit: Amazon)

View On Amazon View On Optics Planet

I have been using this red dot for almost a year now, and I’m very impressed with its accuracy, durability, and overall performance.

I have used many red dots for my sig 320 handguns, but I was disappointed with their performance each time. So many of them are cheap but are not worth the money. But Leupold delta pro blew my mind.

I have tested this Leupold Delta Pro Reflex Red dot on several occasions, performing very well. It’s a bit expensive to buy, But I’m sure You won’t be disappointed with this red dot if you own a Sig p320 handgun and are looking for the best one to mount on it.

The Leupold DeltaPoint Pro Reflex is a battery-saving red dot sight. Motion sensor activated reflex sight that provides unparalleled ease of use.

It features top-loading battery access and 1 MOA click adjustments for unmatched precision and accuracy.

The DeltaPoint Pro Reflex Sight from Leupold is a rugged, waterproof sight that’s equally at home in hunting or tactical environments. With its 100% waterproof construction, the DeltaPoint Pro is perfect for use in any weather conditions.

That’s why it is my favorite sight for p320.

Reason to Buy

It is compatible with sig p320 without any modification.

  • Bright glass crystal clear view
  • Motion detection feature
  • Works perfect in low light conditions
  • No modification required 
  • High price tag

2. Vortex Optics Viper Red Dot Sight – 6 MOA Dot

Vortex Optics Viper 6 MOA Red Dot Sight
Vortex Optics Viper 6 MOA Red Dot Sight (Image credit: Amazon)

View On Amazon View On Optics Planet

The vortex viper is one of the best red dot sights, almost half the price range of Leupold DeltaPro. I have used this Vortex optics viper for my sig p320.

So, if the Leupold was out of your budget, then vortex viper is the best alternative.

The vortex viper red dot is incompatible with sig p320 without slide milling or modification. Despite the extra cost of milling, the vortex viper is still more affordable than my top pick, Leupold delta pro.

The Viper best Red Dot Sight is a great option for those who want to keep their handguns low Profile. With its super slim design and quick installation process, this right red dot sight will have you shooting like an expert in no time!

The low height of the Viper makes it perfect for co-witnessing with iron sight, and 6 MOA dot means you can get on your target fast.

With its fully-multi coated lenses and ultra-clear lens, it is perfect for viewing in all conditions. its Armortek coating protects the lens from dirt and scratches while also protecting it so that it stays clean.

Vortex is a popular choice among hunters due to its high-quality glass and ironclad lifetime warranty.

Reason to Buy

It is the best budget red dot sight for p320.

  • Affordable
  • Low profile
  • Lightweight
  • Life time vortex official waranty
  • Highly Durable
  • Requires special adapter 
  • Requires milling

3. Sig Sauer SOR1P 100 Romeo 1 Pro

Sig Sauer SOR1P 100 Romeo 1 Pro
Sig Sauer SOR1P 100 Romeo 1 Pro (Image credit: Amazon)

View On Amazon View On Optics Planet

The Sig Sauer Romeo 1 pro reflex sight is my third favorite red dot sight for sig p320.

The Sig Sauer Romeo 1 is the best red dot for staying in a sig family. The Sig Sauer is the stand-alone winner if you stick with Sig Sauer.

It is compatible with almost all 320 models.No no need to buy a special adapter plate to mount red dot sight. However, if you buy a Sig Sauer Romeo 1 pro reflex sight, there is no chance of incompatibility.

The Romeo1 Reflex Sight from Sig Sauer is small enough to fit on almost any handgun without making it feel bulky, yet significant enough to help you acquire your target.

Sig Sauer Romeo 1 pro-high-performance coatings ensure that the lenses have zero distortion and excellent light transmittance.

TruHold’s Lockless Zeroing System is an innovative solution that withstands handgun recoil and returns your sights to zero after each shot.

The twin adjustment springs found in the Truhold design make it ideal for use with powerful weapons such as sig p320

Reason to Buy

It is the best red dot sight for sig p320 without slide milling.

  • windage and elevation adjustments 
  • aircraft-grade aluminum
  • No mods required 
  • Rugged
  • Battery life can be improved

4. Trijicon SRO Sight Adjustable LED 2.5 MOA Red Dot Sight

Trijicon SRO Adjustable LED 2.5 MOA Red Dot Sight
Trijicon SRO Adjustable LED 2.5 MOA Red Dot Sight (Image credit: Amazon)

View On Amazon View On Optics Planet

These Trijicon red dot sights are very popular, and almost everyone loves them. The Trijicon is one of the best manufacturers of premium red dot sights.

The Trijicon SRO is an awesome red dot choice for those who want a bright illuminated reticle and crispy sight picture.

This red dot sight is quite expensive, but it is worth the price. I put this on my list because of its brand prestige. if you have the extra budget, then go for it

The Trijicon SRO is the crispiest red dot that I have ever tested used on my sig p320. In addition, it is very simple to use and maintain.

The brightness control on the Trijicon SRO allows for quick reticle adjustment. In addition, the 2.5 MOA red dot makes target acquisition easy in both bright sunlight and low light conditions.

I put this sight in fourth place because it won’t fit directly on your sig p32. Instead, you have to buy the RMR adapter plates for sig 320 models.

If you can afford and pay extra money for the RMR adapter, you must buy Trijicon SRO. No other red sight can beat this sight in quality and crispy sight pictures.

Reason to Buy

It is the best high-end premium quality red dot sight for sig p320.

  • Long battery life
  • Night vision compatible
  • High quality
  • 5 year warranty
  • Waterproof
  • Expensive 
  • Need special adapter 
  • Mods required

5. Burris FastFire III

Burris FastFire 3 
Burris FastFire 3 (Image credit: Amazon)

View On Amazon View On Optics Planet

The Burris fast fire iii reflex sight is one of the most popular red dot sights in the market.

It is the best quality red dot for those with astigmatic eyes who wear glasses.

If your eyesight is not perfect, this sight will be the best choice for you because it has four different reticle brightness settings that allow you to adapt to any lighting situation.

Most competitive shooters recommend Burris fast fire three because it almost costs half the price compared to the Leupold and Trijicon with almost the same features.

The Burris fast fire 3 is a reliable red dot sight because it can be used in situations where quick target acquisition matters.

The FastFire III is a lightweight and durable sight that can be used as your primary sight with your sig p320.

Reason to Buy

It is the best red dot for sig p320 if you have an astigmatism eye. This red dot sight has been giving people low budgets happy results.

  • Good value for money 
  • Lightweight construction
  • Easy to use
  • Affordable
  • Battery life 

also check: best lights for sig p320

Buying Guide for The Best SIG P320 Red Dot Sight

If you own sig p320, that doesn’t mean you can only use a red dot sight that belongs to the sig family. To be honest, sig Sauer red dots are very good but not the best ones for sig p320.

It depends on personal preference, and some people prefer sig Sauer red dots on sig p320. Others like me who want to upgrade their p320 to its maximum level prefer other brands.

Sig p320 is a popular handgun. So Many good brands offer adapter plates, so you can choose pistol red dot sights that offer adapter mounting plates to fit your sig p320.

You also have the option of slide milling your sig p320 so you can mount any red dots available on the market. Many professionals out there can do custom slide work at a reasonable price.

Here are some of the most important factors you must consider before buying the best red dots sight for sig p320.


Sig Sauer p320 is not one handgun that can be easily used with just any red dots. So, you must consider the compatibility issue before buying red dots for sig 320.

Suppose you don’t want to Modify or customize your sig p320. Then, you can buy the Leupold red dot sight for sig p320 which requires no modification.

Size & Weight

I always prefer lightweight red dot sights. I think every shooter should feel the weight of their guns when carrying them in a field. But it all comes to personal preference. Just remember when you mount a red dot, the weight will increase.

Battery Life

If you’re like me and prefer not to swap out your batteries too often, then my favorite red dots will be perfect for you. I know that these sights won’t die too often with longer battery life.


Every red dot sight listed above is great for sig p320. I personally like Leupold and Trijicon the most because of their brand prestige and high-end performance but, if you have a low budget, buy Burris fastfire 3 and Sig Sauer Romeo 1 Pro. Sig Sauer Romeo 1 Pro is the best reflex sight for sig p320 without slide milling that you can buy right away.


What red dots are compatible with SIG P320?

Every red dot sight listed above is compatible with sig p320. And you can choose any of these red dots because they are the best for sig p320.

Is SIG P320 optic-ready?

Sig p320 is optic-ready so you can choose from the best red dot sight for sig p320 or reflex sight for sig p320 without slide milling.

What red dot sight will fit the SIG M18?

The sig m18 is a completely different model than the sig p320, so don’t buy the same red dot sight models listed above.

Related Post