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{TOP 10} Best Red Dot For Sig p320 Review (2023 Updated)

Aiming faster and more accurately at your target can become challenging when you do not have a sight. This is especially true if you own a Sig Sauer P320 pistol. As a result, you should get the best red dot for Sig P320 to improve your chance of hitting your targets faster.

Best Red Dot For Sig p320 Reviews

It’s considerably more difficult if you’re using a P320 because it’s a very compact weapon, and you may need to respond to specific circumstances as rapidly as possible.

To solve this problem, you need to use a high-quality red dot for your Sig Sauer P320. 

You can quickly engage any target when you have support from the optics, whether you’re shooting during the day or at night. But the issue is, what distinguishes a Sig P320 red dot from others? That is exactly what this post is all about. 

We will take you through the factors you need to consider when purchasing a Sig P320, our top 10 red dot recommendations, and some frequently asked questions. So, let’s get started already!

Here are our top Red Dot For Sig p320:

What Is the Function of a Red Dot Reflex Sight?

The technology underlying red dots is very straightforward. A LED (single) is powered by a battery in a contemporary reflex sight. This LED shines a green or red light via a concave lens. These lenses have a kind of coating that makes the illuminated points visible to you for aiming.

Is the Sig P320 superior to the Glock?

Both guns have advantages and disadvantages, and the choice ultimately boils to the individual’s preference. Some individuals like the Glock 19 due to its smaller and far more compact design, whilst others prefer a Sig P320 because of its larger and more adaptable magazine capacity.

You can read more about the best red dot for glock 19

A Buyer’s Guide for SIG P320 Red Dot Sights

If you just got a Sig Sauer p320 pistol as a home defense weapon, it doesn’t necessarily mean that you must only use Sig Sauer-branded red dot sights. To be sincere, Sig Sauer red dot sights are excellent optics, but that doesn’t make them the ideal pistol red dot for a Sig P320 firearm.

Personal choice is important. Some shooters prefer a Sig Sauer red dot, while other shooters, like myself, who want to maximize the best performance of the P320, choose other brands that are more appropriate for the shooting application the pistol would be used for.

The Sig P320 is a well-known pistol, and it has a bunch of models. Many reputable optic companies have an adapter plate in the pack, so you may select a pistol red dot sight that includes an adapter plate for the sight mounting to match your Sig P320 platform.

You can also slide mill a sig p320 pistol so that you can attach any type of red dot on it.

Many pros can create unique slide designs at a reasonable cost.

Here are a few of the most significant things to think about when choosing the best pistol red dot sight for your sig p320.

Dot Size

The first significant factor we will consider while making our sight selection is the size of its reticle dot. Smaller dot sizes cover less area on a target, giving the shooter more room for a more accurate shot. 

The bigger the reticle dots, on the other hand, are simpler to see, allowing faster target acquisition but might be less accurate for smaller target areas because the dot would cover some target parts, thereby reducing possibilities of pinpoint accuracy.

Since the Sig P320 pistol is often used at closer ranges, you’ll need a red dot that is at least 4 MOA, preferably 6 MOA or greater for man-sized close targets.

Which Dot Size Should YoBu Use: 3 MOA or 6 MOA?

Bigger dots – A frequent misconception about red dots is that a larger dot can help you acquire and aim faster (I’m talking of 6.5 MOA dots or as big as 9 MOA). That is just not true; they will not assist you in acquiring your aim faster all the time.

The biggest disadvantage of a larger dot is that you’ll not be able to take a precise shot from a distance. The dot size will obscure the target, and you will not be able to see it fully.

We propose a 3 MOA red dot or smaller since it can do what a larger dot can and allows you to take precise shots at longer distances. If your dot isn’t noticeable enough, simply increase the brightness settings. 

Essentially, a 3 MOA red dot can do the same thing as a 6 MOA reticle, but the reverse is not always true.

Brightness Controls

In general, red dots have a variety of brightness settings from which you can choose, while some have automated brightness that adjusts to the ambient light. There are also other red dots that have both features.

Neither choice is undesirable. The best one for you simply depends on whether you want more control over the brightness of your reticle or prefer to have the sight do that on its own, leaving you with one less thing to worry about.

Battery Life

Red dot sights need a battery to function, and they often use a CR1632 or CR2032 battery, which makes so much difference among the things you’ll be looking for when purchasing a sight. This is because red dot sights from different manufacturers and sometimes even from the same manufacturer need different batteries to power the dots.

With a bigger battery, the sight must be built to be larger and would definitely weigh more. Some types of batteries are more costly or harder to get. Fortunately, most red dots, whether heavy or light battery usually has a longer battery life; as a result, replacement would be a rare occurrence. 

If your red dot sight includes capabilities like motion detecting and automated cut-off, the battery life is extended for a longer period.


Since mounting a  red dot sight to your firearm has become a needed component for the weapon, durability of the sight must be checked. This means that the optic must be as strong and long-lasting as the firearm. As a general rule, it should be built of steel or aluminum to provide long-term durability.

Spending on an optic that can withstand almost anything that’s expected to be thrown at it is a wise decision. Even though it’s more costly, you’ll still get value for your money compared to buying cheap, fragile sights that will get damaged every now and then.

Get a red dot sight that is shockproof and waterproof, at the very least. A scratch-resistant coated lens is also useful for safeguarding your optics surface. A Cerakote or hard-anodized coating protects the housing of the optics from scratches and scuffs.

When it comes to the housing of the sight, make sure it is composed of tough material, such as aluminum.

Mounting Plate 

Given the wide range of handguns and red dots available, you’ll agree that not all red dots can be mounted directly on any firearm. However, it is not game over if your desired red dot will not install straight into your P320.

For a few bucks more, you can always obtain a mounting plate that acts as an adapter plate.

Compact Design and Compatibility 

It is not a good idea to mount a red dot sight on your weapon that spans the entire length of the gun. Examine the gun’s dimensions and that of the sight before making a final decision. Make your last decision depending on the sight’s compactness. Asides from being able to mount your sight, you would also have some amount of space

The Sig P320 is not a pistol that you can use with any red dot sight. So, before purchasing a red dot for this gun, you should think about compatibility.

Assume you do not wish to change or alter your sig p320. Then you may get the Leupold sight which does not require any modification.


Getting a durable sight does not imply that the sight must be hefty. Many high-quality SIG P320 sights weigh far below 2 ounces. A lightweight sight makes a concealed carry optics and pistol combo easy to store. And Lightweight sights also make shooters more confident, whether they’re hunting or target shooting.


I usually like red dots that are lightweight. I believe that every shooter should be able to feel the weight of their firearms when handling them in a field. However, it all boils down to personal choice. Remember that mounting a red dot will increase the weight of your weapon slightly.


When choosing a sight for your Sig P320, one important factor to consider is budget. Red dots are available at a wide variety of pricing ranges, and it is a good idea to have a budget in mind before delving too deeply into your selections.

Price Ranges for Pistol Red Dot Sights 

When discussing pistol reflex sights, there are generally three pricing groups. 

  • Under $100
  • Around $200
  • $400+
Red Dot / Reflex Sight Under $100

In this pricing range, most of the sights are made in China. We’ve grouped them all together because there’s usually no discernible difference in terms of quality.

They’re usually the same Chinese models offered under different labels.

The majority of these low-cost sights operate and even keep their zero. However, they are neither long-lasting nor dependable. You might not know when it will stop working or shift zero. With this pricing point, defects are rather prevalent.

They’re useful for testing a red dot sight and determining whether it is something you want to deal with.

However, if you want a dependable handgun sight, you need to save up some money so you can get a mid-price.

Red Dot / Reflex Sight Under $200 

This price range (between $100 – $200) is a sweet spot in terms of value for money. Sights like the Vortex Venom and Burris Fastfire lead in this category. They’re both excellent red dots that tick all the criteria for a quality sight.

This price range the greatest option if you want a reliable sight but don’t want to spend so much.

The biggest limitations of these red dots as compared to the high-end category are glare on higher light settings and build quality. They keep their zero really well.

Red Dot / Reflex Sight $400 or More

Field or duty sights are available in this price range. They’re frequently produced in the United States to military specifications and can withstand whatever punishment.

The sights have almost no drawbacks and can last a lifetime if properly cared for. Sights like Leupold DeltaPoint, Trijicon RMR, and Sig Sauer Romeo 1 are all in this group.

Best Red Dot For Sig p320 Details Reviews

1. Vortex Optics Venom

The Vortex Venom meets all our requirements for the finest pistol reflex red dot sight.

The tough aluminum structure of this sight is reliable, and it has a clear and broad glass that gives shooters a nice sight view. The sight comes with a top battery compartment, and this reliable brand backs up the sight with a lifetime warranty.

The Venom Optics has been abused over the years on the field, handling anything from tactical training to competition shooting, and it will never disappoint.

So what distinguishes Vortex Venom from the competition, particularly a sight like the Burris FastFire, which costs almost the same?

This reflex sight offers sharp dots and keeps the zeros even after extended shooting periods. It is an excellent, tried-and-true sight for beginners. 

Nonetheless, after careful consideration, we choose this Vortex Venom over  the Burris FastFire for four major reasons listed below:

A broader FOV– The glass in this Vortex Optics is wider. The bigger lens provides Venom a modest advantage over the competition in target acquisition since it captures more areas in the field of vision.

Better brightness adjustments– The Vortex Venom has an up-and-down brightness adjustment as well as 8 distinct illumination settings. Other sights like the Burris Fastfire simply have one button for altering brightness settings.

Auto mode – Having more brightness settings on Vortex Optics means the transition will be smoother.

Lasting battery life – The Vortex Venom has a stated battery life of about 15,000. Furthermore, concerns with limited battery life are more typical with the brands than with the Vortex Venom.

To preserve battery life, the auto power-down feature kicks in after around 14 hours.

When you tune the elevation and windage adjustment dials, you will hear an audible click. 1 click equals 1 MOA.

As mentioned earlier, the battery access is on the top, eliminating the need to remove the sight when changing the battery.

The most prevalent criticism about Vortex Venom is when the battery has to be replaced. Some people struggle to tighten the cap. Screwing down the lid will need some force.

Higher brightness levels will cause your dot to become bigger and less clear. This is common and will occur with all sights in this price range.

Finally, because these sights are built in the Philippines, flaws do occur. However, Vortex is well-known for providing one of the finest warranties. If your goods is not perfect, you will receive a replacement right away.

Vortex Venom is a steal at half the price of a military red dot. There is no better bang for your dollar than this. Given the specifications, the Vortex Venom is unquestionably the best pistol red dot sight for p320. It is also great for red dots for Glock MOS and most other common mounting systems.

You may also read: best vortex scope for deer hunting

2. Leupold Delta Point Pro

Regardless of what version of the Sig P320 pistol you have, the Leupold DeltaPoint Pro is unquestionably another great red dot that doesn’t require any modifications.

All Sig M18, M17, and XFIVE Legion models are DeltaPoint complaints, however, if it appears that any concerns occur with your specific model, it is better to approach Sig.

When installing the DPP, there is also a danger of losing the rear sight that comes from the factory. 

For starters, the DPP sight provides excellent pictures in both low and high light circumstances. This red dot also reduces glare, so you will not have to be concerned about that.

Another unique feature is that it is built of spring steel and aluminum yet weighs only approximately 2 ounces.

It also has outstanding picture quality and a broad field of view that is beneficial for individuals with impaired eyesight or aging eyes.

The reticle of this sight will automatically switch off after about 5 minutes inactivity thanks to the battery-saving motion sensor. When movement is detected near the sight it will immediately reactivate.

As a result, the power-saving motion sensor function, along with the overall battery economy, enables about 300 hours of battery life (or 1,600 hours on low settings) on a full charge.

Taking everything into account, Leupold DelatPoint Pro is the finest option for Sig P320 because of its crystal-clear performance.

3. Trijicon SRO

Trijicon is a renowned brand for producing some of the best red dots on the market. As a result, it is no surprise that Trijicon made this list of best pistol red dots for P320.

Unfortunately, SRO sight will not operate with your P320 out of the box, unlike the Leupold DeltaPoint.

The SRO/RMR Adapter Plate, on the other hand, is compatible with all Sig Sauer P320 variants. The plate is simple to reach. Nonetheless, it is not cheap. 

Although Trijicon offers an amazing feature that makes it appealing to a wider range of consumers, you need to consider the price/budget.

One of the first things we observed when using this SRO sight was a very clear red dot compared to any other red dot we’ve ever used. 

Furthermore, because of its 8 brightness levels and 2 night vision settings, the SRO may function at any time or in any weather. The sight is composed of 7075-T6 aircraft-quality aluminum, making it both lightweight and robust. With a weight of only 1.6 ounces, it will be difficult to notice it on a pistol.

Trijicon has one of the finest battery backups among competitors. 

SRO can deliver continuous performance for up to 3 years with a single battery and average settings. Since the battery is top-loaded, it is simple to replace.

Trijicon also offers a 5-year warranty to buyers.

4. Vortex Viper Red Dot 

The Vortex Viper Red Dot optic is one of the most affordable options for Sig P320. If you believe the Trijicon SRO red dot is out of your budget, this one will do.

However, you need to remember that this Viper sight will not function with the Sig P320 without cutting or milling the optics. Despite this, it is still one of the most cost-effective options.

There’s hardly any pro shooter that has not heard of the Vortex brand before now; this is because the firm has created a solid reputation for itself in the previous decade with the quality and variety of optics they produce..

Vortex also offers a lifetime warranty on its goods in addition to high-quality lenses and low prices.

Most shooters now prefer Vortex products over other companies because of the superb warranty.

This quality Viper red dot is lightweight, and it has a modest profile, weighing only 1.03 oz.

Vortex also added its multi-coated lens technology, which allows it to see a bright and clear image regardless of lighting conditions.

This sight also has parallax-free performance. The ArmorTek coating helps to prevent scratches and delivers great durability.

5. Sig Sauer Romeo 1 Pro

The Romeo1 Pro sight by Sig Sauer is another great red dot optic for Sig P320 pistol. This sight is particularly for those who are a big fan of the Sig brand.

This Sig Romeo sight is compatible with the XFive Legion, M17, XFull, XCompact, and Pro Series 320. So if you have any of these p320 pistols, you can be sure of having a successful mount.

If you get this sight, you’ll never have to deal with compatibility issues as long as p320 is concerned. You don’t have to bother about purchasing pricey adaptor plates, so you’ll save some money in that regard.

Furthermore, the Romeo1 Pro is an enhanced version of the Romeo 1 that has several notable changes like as an aircraft-grade aluminum frame and a better display.

A point-source emitter is one of the primary components that has been updated to boost brightness. The inclusion of this component makes the dot appear brighter and clearer in all lighting conditions.

As an additional feature, the Sig Romeo sight has 12 brightness settings; it is nearly difficult for the shooter not to find a brightness level acceptable for the brightness of the day. They are also night sights.

Sig Romeo brand has earned a reputation among the top companies for providing one of the greatest glass quality at the most reasonable pricing.

Sig’s SpectraCoat is used on the Romeo1 Pro. This coating effectively transmits light while increasing edge-to-edge clarity. The coating is the same as that seen on most  Sig rangefinders.

Furthermore, the rugged protective shroud reinforces and strengthens the already tough metal.

The motion-detecting feature of this sight distinguishes it from others, and there are also no compatibility concerns with any P320 model. It has a 5-year warranty.

6. Burris FastFire III

If you are looking for a red dot with which you can specialize in high-end and tactical operations demanding high precision, then this Burris FastFire will be handy. Because of its adaptability, this sight may be used successfully by both plinkers and large game hunters.

You don’t have to worry about the safety of this sight while packed because of its durable construction and lightweight design. 

Getting used to this sight won’t take long because of the handy buttons you can use to alter the settings. While focused on your objective, you will have little trouble reaching its huge buttons.

With 3 distinct brightness levels, you may change the brightness settings based on your lighting environment. 

The lens of the sight is weather-proof, and it allows you to shoot in not just adverse weather but also in any setting. The tough aluminum shell protects the glass and guarantees that scratches are avoided by all means.

When the battery in your Burris sight runs out, a low indicator will blink. As a result, you may simply evaluate whether your optic is suitable for a long mission or if a backup is required.

A top-mounted battery allows for simple cell swapping as needed.

7. Trijicon RMR Type 2

As previously stated, the Trijicon RMR is an ideal optic for Sig P320.  To begin with, the RMR sight is an exceptionally sturdy and dependable optic. The housing of the sight is forged with aluminum.

Moreover, it is waterproof to about 66 feet under water and can readily withstand the worst damp or rainy situations. The RMR sight also features an extremely long battery life (about 4 years), huge brightness adjustment controls that are simple to operate, and numerous models with varied reticle sizes and kinds.

The 3.25 MOA and 6.5 MOA dots are the two most frequent reticle choices. Both are nice alternatives, but I like the 3.25 MOA dot since it is easy and quick for your eye to notice and it is also small enough for precision aiming.

The one disadvantage of putting an RMR on your Sig P320 it this pistol does not often have a slide cut for the RMR footprint.

With the aid of an adapter plate, you can simply attach the RMR to your Sig P320.

Overall, the Trijicon RMR is extremely tough, durable, and has a long-lasting battery life. It is also simple to operate and has an excellent reticle. 

8. Holosun HS507C – X2

We cannot proceed with this list without adding a Holosun optics. The Holosun 507C is quickly becoming a renowned pistol optic, and it is a  great budget optic for Sig P320 pistols.

There are so many reasons why we added this Holosun 507C to this list. To begin with, despite the fact that the housing of this optic is made of 7075-T6 aluminum instead of titanium like the Holosun 508T, it is still an extremely tough and dependable sight. 

Furthermore, the 507C sight is waterproof to about 1 meter underwater. Even though it is less popular, it still delivers on its reliability and ruggedness.

This 507C model has the Holosun Multiple Reticle System, which includes a 2 MOA dot, a large 32 MOA circle, and a Circle Dot Reticle (this dot allows you to shoot rapidly and precisely).

And, like the 508T, it has a very long-lasting battery life (approximately 50,000 hours). the sight also features the Shake Awake technology to preserve battery life and Bluetooth connectivity. It comes with a solar panel that lets you operate the sight even when there is no battery. 

The battery of this optic is side-loading, and it allows for easy and quick battery swaps when needed. You will most likely need to utilize an adapter plate for the firm mounting of this red dot.

9. Ade Advanced Optics

“Advanced” is hardly the first term that comes to me when I think about ADE’s Huracan pistol reflex red dot sight. It is a low-cost Chinese-made sight that just comes with all the essentials in a sight.

Some compare them to the Vortex Venom, claiming that ADE does the same thing for a good price. Respectfully, we disagree. This sight is larger and heavier than the Vortex optic.

The sight maintains its zero on weapons, something other inexpensive sights do not. There are five different degrees of light. When you switch on the optic, it remembers the last time you used it. It does not have an auto mode.

When juxtaposed with more costly scopes, this red dot is a little warped, but it still appears like a dot and performs perfectly.

To conserve battery power, the pistol sight automatically turns down after 1 hour.

This sight frequently has quality issues, such as the sight shutting off or losing zero. Unlike the firms mentioned above, ADE does not provide a lifetime warranty. When you receive your unit, thoroughly inspect it.

You may need to get a separate adapter plate for the sight, which will cost you extra.

The battery can easily fail; I’ve read that it fails after some weeks. To replace the battery, you must remove the sight from the rifle.

If you have Astigmatism, you can get a green dot sight to help you see better. Check out this article on Best Red Dot Sight For Astigmatism.

10. Crimson Trace CTS – 1550 Open Reflex Sight

Crimson Trace makes a lot of wonderful gear for gun aficionados, and this CTS-1550 model is no exception.

The sight is made of tough polymer, which is durable and lightweight but may not withstand as much abuse as aluminum or stainless sight.

This sight matches the shield RMS footprint and provides excellent battery life. The single battery is on the underside.

This CTS-1550 sight has an interesting function in that it recognizes the illumination conditions in your area and changes the dot brightness appropriately.

It is lightweight and small, making it ideal for pistols that satisfy the same requirements.


Are Pistol Red Dots or Reflex Sights Worth It?

When it comes to handgun accuracy, adding a red dot is very much worth it, especially for medium and long-distance shots. As a result, reflex sights outperform iron sights. An iron sight cannot give you a fast target acquisition, so it is better to use a red dot sight that will increase your accuracy over time.

How Much Does A Pistol Red Dot Cost?

Quality handgun red dots range in price from those less than $200 to the $200 – $400 range of “bang for your buck” types (Burris, Vortex, and so on) to the $500+ military-grade category (like Leupold Delta, Trijicon, and others). If you want a dependable optic, your expenditure shouldn’t be less than $200. However, if you’re just looking for a cheaper practice sight, you may go for a less expensive airsoft variant that cost around $50.

Should Reflex Sights on Pistols Be Left On When You’re Not Using Them?

Most shooters are lazy, and some often forget to power off their sight after use. If you are one of those, you will need a good dot that comes with an auto-off mode to conserve battery life while not in use. 

Do the military and special forces use red dot sights on their pistols? What models?

The simple answer is YES; the military, including special forces, uses reflex sights on handguns. Handgun red dots are significantly more widespread in the military currently than in the old times.

The military makes use of professional sights from companies like Trijicon, Leupold, EOTech, and Aimpoint. These devices are roughly double the price of a typical consumer sight.

What Is the Range of a Reflex Sight?

Red dots have a maximum range of roughly 100 yards. Beyond 100 yards, the accuracy will be determined by the target’s size and the dot MOA. Reflex sights do not have magnification; as a result, they’re best-used for mid-range shots and less effective for long-range shooting.

Are Red Dots Free of Parallax?

In practice, they do not have any parallax. Quality red dots are built to have parallax at close ranges where it has little influence on accuracy. Red dots usually do not have parallax at normal engagement ranges.

That is also why they are commonly referred to be “parallax free” by manufacturers. With the probable exception of laser sights, no sight is entirely parallax free.

How Far Should You Set The Zero?

We recommend a 10 yards zero for most folks if you intend to use your firearm for self-defense. This will improve your accuracy around 10 yards range, which is where the majority of gun battles take place. You can use a 10 yards zero to strike a target at roughly 150 yards.

how to set a rifle scope at 25 yards

Which red dots work with SIG P320?

You can place any micro red dot on a SIG P320, however, some may require an adapter plate. DeltaPoint and other products with a similar footprint may be installed on the M18, XFIVE Legion, and M17.

What red dots are compatible with the SIG P320?

The P320 M17 is designed to meet the MHS contract criteria of the United States Military. Any micro red dot sight with this mount format can sit without a plate.

Is Sig a decent red dot maker?

Sig is popular for manufacturing high-quality red dots at a variety of price points. If you get a Sig sight once, you’ll not want to buy another brand of handgun again. You only need to consider your handgun compatibility with their red dot and purchase one appropriately.

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2 thoughts on “{TOP 10} Best Red Dot For Sig p320 Review (2023 Updated)”

  1. I have a Vortex Viper and I can verify that it will not mount on my P320-X Compact. The sight runs into the rear sight and the holes do not line up.

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