SIG P365 Red Dot Sight Choices [Buyers Guide & FAQs]

Sig Sauer has made some excellent pistols throughout the years, being for long the Secret Service’s preferred pistol brand with the Sig P226 is a true reflection of their credibility. There are many red dots on the market, yet only a few great red dot sights that will complement your P365 and maintain its performance. After extensive testing of numerous red dot optics, we decided the Trijicon RMRcc was the best red dot sight choices for your Sig P365. 

 

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Which Is The Best Red Dot For SIG P365

Here is our list of the Best SIG P365 red dot sights.

1. Trijicon RMRcc Adjustable Red Dot Sight
2. Holosun Sub-compact HS507K-X2 Red Dot Sights
3. Shield Sights Compact Reflex Mini Red Dot Sight
4. Viridian RFX-15 1x21mm Micro Green Dot Sight
5. Crimson Trace CT-RAD Micro Pro Red Dot Sight

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1) Trijicon RMRcc Adjustable Red Dot Sight

Trijicon is a favorite for me, I almost always include it in my red dot choices. My favorite from the company is the Trijicon RM06 RMR. But, make no mistake, Trijicon’s entry-level red dot sight, the RMRcc, is excellent, and that is why it is sitting at our number one spot for the best Sig P365 red dot sight. I even compared the Trijicon RMR & SRO if you want more details!

Size – The Trijicon RMRcc, cc stands for concealed carry, measures 1.8 x 0.9 x 0.9 inches, and weighs 1 ounce.

Lens – The RMRcc has a bat-eared design that allows for faster target acquisition. The objective lens diameter is 13 mm and is made of true color, multi-coated tempered glass. Trijicon’s design, combined with the lens coating, minimizes light distortion and reflection, allowing minimal strain on the eye and an optimal sight picture.

Reticle and Brightness Settings – The Trijicon RMRcc has two reticle options to choose from:

• A 3.25 MOA (smaller dot) – Better for aiming down range, providing precision.
• A 6.5 MOA (larger dot) – Better for close-range scenarios such as self-defense.

The RMRcc has eight brightness settings, including a super bright mode and two night vision modes. Using “lock-out” mode, the sight will be put on automatic brightness adjustment mode. “Lock-in” mode will allow the user to manually set the brightness level to that he or she prefers.

Battery life – The Trijicon RMRcc will last you four years on brightness setting #4 before you need to replace the CR2032 lithium battery.

Durability – Remember that bat-eared design, well not only does it allow better shooting performance but also enhances the strength of the sight housing. The sight is made from 7075-T6 aluminum and is also waterproof up to 66ft.

Mount Type – Unfortunately, the Trijicon uses a different footprint to that is compatible with the Sig P365. Thus, you will need an adapter plate before your Sig P365 is an optics ready gun.

Price – Elegance and quality have a price, this sight is the most expensive on our list.

Pros & Cons

PROS:

• Extremely durable
• Great battery life
• Excellent brightness capabilities

CONS:

• Additional adapter mount required
• Expensive

My Experience With Trijicon RMRcc

The compact size of the RMRcc makes for an excellent fit for a concealed carry gun. I love mounting this sight on my Sig when I go hiking because it is so compact and durable. Sometimes, I even forget that it is mounted on my gun.

I preferred the 3.25 MOA over the 6.5 MOA, as I like shooting at longer ranges.

The combination of durability, quality design, and added features puts the Trijicon at #1. However, if you want something less pricy, then one of these other red dot sights might be what you are looking for.

 

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2) Holosun Sub-compact HS507K-X2 Red Dot Sights

Holosun is notorious for its high-quality sights. I especially enjoy shooting with the HS507K X2 as it is a bit of an upgrade to the HS407K X2, featuring the Holosun Multi-Reticle System (MRS) and a failsafe backup solar panel.

Size – The HS507K X2, although shorter than the RMRcc, is a bit taller, the measurements are 1.6 x 0.98 x 0.95 inches, and it weights roughly 1 ounce.

Lens –  The Holosun equipped the 507K with a 20mm objective lens that has been multi-coated for maximum light transmission and providing scratch resistance.

Reticle and Brightness Settings – Holosun features a reticle system that is hands down best in class. The multiple reticle system (MRS) is a toggleable reticle system, giving you the ability to choose between 3 different reticles on your Holosun. These three reticles are:

• Circle Dot Reticle – 2 MOA dot surrounded by a 32 MOA ring (speed x precision)
• 2 MOA dot (precision)
• 32 MOA Ring Reticle – 32 MOA ring with no center dot (speed)

The HS507K X2 has 12 brightness settings, 10 for daylight use and 2 that are night vision compatible. Similar to the RMRcc, a brightness lock mode is also featured on this sight to ensure you don’t accidentally change your favorite brightness level.

Battery life – The Holosun’s battery life is hands down the best on this list, rated to last 50,000 hours on setting six. Shake awake technology is featured on this sight, which is a motion-activated illumination system. When the sight does not detect motion after a short period, it will automatically switch off the sight and automatically switch back on when motion is detected.

Durability – The Holosun is built from high-grade 7075-T6 aluminum, is rated shock resistant up to 5000G, and features IP67 waterproof construction.

Mount Type – The Holosun Sub-Compact HS507K X2 comes with the RMS footprint, thus it will be able to fit onto your Sig P365 directly.

Price – The HS507K-X2 costs $348.22, making it an excellent affordable alternative to the RMRcc.

Pros & Cons

PROS:

• 12 Brightness settings + brightness lock mode
• Shake awake technology
• Easily replace the battery from the side tray – no need to detach the scope
• Multi-Reticle System
• Budget-Friendly

CONS:

• None

My Experience With Holosun HS507K X2

Of all the Holosun red dot sights I have tested, the sub-compact HS507K X2 has to be my favorite. The compact design and added features make it an excellent concealed carry optic.

My favorite features of the HS507K X2 have to be the MRS system and great battery life. I rest easy with the fact that the battery life will well exceed my lifetime. And the MRS makes it so much fun to shoot with it on the range.

The Holosun HS507K X2 is extremely well suited for the Sig P365 and is definitely a close second.

 

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3) Shield Sights Compact Reflex Mini Red Dot Sight

You should know that if the footprint is named after a manufacturer, the manufacturer carries some real credibility. Shield has made sights since the late 1990s, and their workmanship quality can be seen in their Compact Mini red do. In fact, I rated Shield Sights as one of the Best Hellcat Pistol Optics that I’ve tested.

Size – The RMSc measures 1.57 inches in length, 0.97 inches in width, 0.8 inches in height, and only weighs 0.61 ounces.

Lens – The RMSc comes in two lenses: a polymer lens and a glass lens

I prefer the polymer lens version of the Shield RMSc over the glass version. The optical clarity is some of the best I have encountered with a red dot sight, and it can withstand up to 10 times the shock impact of normal glass lenses.

Reticle and Brightness Settings – There are two models with different reticle options available: the 4 MOA dot reticle and the 8 MOA dot reticle.

The RMSc has an auto-brightness mode that will adjust the brightness level according to the ambient lighting conditions. The lowest is compatible with night vision, and the brightest allows visibility even when holding it up to the sky in bright daylight.

Battery life – The RMSc is rated to have a battery life of between 2 to 3 years. However, the battery compartment is fitted underneath, which can be a real struggle as you need to detach the scope to replace the battery.

Durability – The Shield is the most durable red dot sight on this list, it has three key features that allow it to be the most durable:

• Aerospace aluminum construction
• Supporting side rails.
• The optional polymer lens

Mount Type – As I mentioned, the footprint is named after the Shield RMSc. Thus you can rest assured that this sight will surely fit onto your Sig P365.

Price – The RMSc comes in two models available, and the price is quite competitive with market standards. The price for the two options are:

• Polymer: 4/8 MOA Dot: $400.00
• Glass: 4/8 MOA Dot: $429.99

Pros & Cons

PROS:

• Polymer lens enhances durability and optical clarity
• Insanely durable
• Built-in light sensor featuring a self-adjusting dot intensity
• Direct mounting

CONS:

• Battery compartment located underneath – red dot sight will need to be detached from the gun in order to replace it

My Experience With THE SHIELD Sights

This is the first sight I shot with that didn’t give me eye strain after a while. The maneuverability of the RMSc and Sig P365 combo is also extremely good, making clearing out buildings with tight corners or rapid target shooting easy.

 

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4) Viridian RFX-15 1x21mm Micro Green Dot Sight

At number 4, we have the Viridian RFX featuring a green reticle, and might I say, this little sight impressed me a lot. In fact, I rated the RFX as one of the Best Red Dots That Fit Canik TP9SF in my testing.

Size – The measurements of the Viridian are: 1.6″ in length, 0.86″ in height, 0.98″ in width, and it weighs next to nothing, only 0.63 ounces.

Lens – The fog-proof 24mm diameter objective lens provides excellent optical clarity, making target acquisition really efficient.

Reticle and Brightness Settings – As already mentioned, the Viridian features a green reticle that is 3 MOA in dot size. Which I think is an excellent intermediate size, ideal for fast and accurate shots at close range, as well as precision long-range shooting.

You will find your Viridian is equipped with ten brightness levels, eight visible and two being night vision compatible.

Battery Life – This dot sight is fitted with a great feature to extend its CR2032’s battery life, enabling it to achieve an impressive 30,000+ hours on middle settings. These features include Auto Shut-Off and the patented INSTANT-ON functions. The instant-on immediately switches your Viridian on when it senses motion.

Durability – I like the construction of this lightweight sight, the quality really shows in its design! Its durability is second to none with its 6061-T6 aluminum alloy body and high shockproof and waterproof capabilities.

Mount Type – The Viridian uses the Shield RMSC footprint, a massive bonus as it is a direct mount onto your Sig P365.

Price – You can expect to pay $290 for this little sight, which in all fairness, I think is reasonable considering the quality of design and great battery life.

Pros & Cons

PROS:

• Ultra lightweight – Excellent manuevariblity
• Amazing battery life with great added features
• Quality design
• Direct mounting on the Sig P365

CONS:

• I would have liked a red reticle and more MOA options

Our Experience With Viridian RFX-15

At first, I was a bit dismayed by the green reticle and the fact that it only comes in green. However, after testing it, I can say this green reticle really performs, especially in the woods, with sunrays breaking the canopy every now and again.

This sight’s low profile is another huge bonus for me, as it makes night vision compatibility that much easier.

 

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5) Crimson Trace CT-RAD Micro Pro Red Dot Sight

Coming in at #5 is our wild card, the Crimson Trace RAD Micro Pro. The Crimson is a relatively new red dot sight to be released to the general public. In fact, I also rated Crimson Trace as one of the Best PPQ Sights that I’ve used!

Size – Like the rest of this list, the RAD is also a compact red dot sight measuring 1.7 x 1 x 1 inch and weighing only 1 ounce.

Lens – Crimson enhanced the durability and useability of its multi-coated lens by recessing it into the housing and also making it highly fog proof.

Reticle and Brightness Settings – This red dot sight is equipped with a 3 MOA reticle, similar to the Viridian. It has a built-in ambient light sensor, allowing the sight to adjust the brightness based on the surrounding lighting conditions.

Battery life – The RAD’s CR1632 battery is rated to last 10,000 hours, the sight also features shake-awake technology to optimize battery efficiency.

Durability – This little red dot sight features a smart design, allowing stress inflicted on the sight to be diverted away from the lens when the sight is dropped. However, this sight has very good durability. Many shooters ask where are crimson trace scopes made & are surprised to hear China & the Philippines.

Mount Type – The RAD Micro Pro has the Shield RMS optic cut, allowing for direct mounting on your Sig.

Price – The RAD Micro Pro is the most affordable red dot sight on this list, costing only $275.

Pros & Cons

PROS:

• Shake’N Awake tech
• Light sensor
• Reinforced toughness
• Rear notch for easy alignment with front iron sights
• Affordable

CONS:

• Like the Veridian, I would have liked more reticle color and size options.

My Experience With The Crimson Trace RAD Micro Pro

The RAD is one of the latest red dot sights I had the honor of testing, and it deserves its place in the top 5 list.

The automatic brightness settings were surprisingly versatile, allowing me to make fast target acquisition in all sorts of lighting conditions.

However, I prefer a different design though, all the curves and edges are not to my liking and make it feel a bit bulky. Yet, it still remains a good choice for your Sig P365.

 

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Buying Guide

Before making a purchase, you need to understand how to choose a red dot sight properly. There are certain factors that will differ from person to person.

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Benefits Of Using A Red Dot On Your SIG Sauer

• Accuracy – A red dot will allow you to shoot further with better accuracy than a mere rear sight and front iron sight combo.
• Precision – Even at short ranges, you will notice an increase in your shooting performance, allowing for precision with fast target acquisition.
• Night Vision – The night vision capabilities on most red dot sights allows for it to be used with a night vision device, extending your Sig’s useability to night shooting – extremely beneficial for self-defense.
• Brightness settings – A red illuminated reticle will allow you to comfortably shoot when the lighting conditions are poor, and the iron sights are difficult to interpret.

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How We Rate Products Like This

When we test a red dot sight or night sights, we make sure to put it under as many real-life applicable tests as possible to ensure its credibility. Their rating is decided based on the following criteria:

 

• Mounting –  Is the mounting universal, or will I need to buy adapter plates before it can be fitted on my particular gun? Some adapter plates can be bulky, basically defeating the purpose of concealed carry.
• Durability – How well will the red dot sight cope when facing the outdoors? Are the housing and sight made from accredited, quality material?
• What added protection does the lens have, like ArmorTec on the Vortex Venom and Vortex Viper red dot, that enhances its scratch-resistant capabilities? Also, look for additional features that will enhance your sight’s durability, like the TruHold system of the Sig Sauer Romeo 1.
• Sight Picture and Accuracy – How good is the optical clarity, and does the reticle MOA size complement my primary objective? The smaller the MOA, the better for long range; the higher the MOA, the better for short range.
• Value –  Is the optic priced competitively with respect to the rest of the market? Does it have any additional features that justify the price and might extend its battery life or make useability better, like a side battery compartment allowing for easy re-install of the battery?

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Frequently Asked Questions

Can you put red dot on Sig P365?

Yes, you can, a Sig P365 has the Shield RMSc slide cut. Any mini red dot sight with that footprint will be perfect for the Sig.

Does it hurt to dry fire a Sig P365?

According to Sig Sauer, it is safe to dry-fire their center fire pistols like the Sig P365. However, if extensive dry-firing is performed, it is recommended to use a snap cap or plug.

Which SIG red dot is the best?

The best red dot sight for the Sig P365 is the Trijicon RMRcc. However, if you want something a bit more budget-friendly, then the Holosun Sub-Compact HS507K-X2 is perfect.

What red dot do Navy SEALs use?

Navy Seals routinely choose the Aimpoint Comp-M2 and 4 or the EoTech 553 as their preferred red dot sight.

What SIG does the Secret Service carry?

The Secret Service's pistol of choice was the Sig Sauer P226. However, as of 2022, they have transitioned to using Glocks.

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The Bottom Line

All these sights are great mini red dot sights, as they will not affect your Sig’s effectiveness by compromising maneuverability. The best red dot sight to pick is the RMRcc. I know it can be expensive for most, which is why I would recommend you read our detailed article on “the best red dot pistol sight for the money,” some red dots featured on that list is the Vortex Venom and the Sig Sauer Romeo Zero.