7 Best Red Dot For Sig P320

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Hey shooters! Welcome to my review of the Best Red Dot For Sig P320 in 2023!

I’ve also had the opportunity to test a range of red dot sights specifically for the SIG P320

With my hands-on experience On SIG P320, you can trust that the insights I’m about to share are as real as it gets. I’ll give you the rundown on functionality, ease of use, and reliability

So, What Red Dot Fits Sig P320?

Here are seven red dot sights that fit the Sig P320 perfectly.

Best Red Dot For P320CategoryPrice
Trijicon RMR Type 2Best Overall$499.99
Trijicon SROBest Wide Field of View$544.99
Holosun 507C X2Best Budget Alternative of Trijicon$309.99
SIG Romeo1 ProHigh Performing Lens$349.99
Vortex ViperBest Compact Sight$224.99
Crimson Trace RAD ProBest Budget-Friendly Option$181.99
Holosun 508T X2Best User-Friendly Design$369.99

Top 7 Best Best Red Dot For P320

  1. Trijicon RMR Type 2 – Best Overall
  2. Trijicon SRO – Best Wide Field of View
  3. Holosun 507C X2 – Best Budget Alternative of Trijicon
  4. SIG Romeo 1 Pro – High Performing Lens
  5. Vortex Viper – Best Compact Sight
  6. Crimson Trace RAD Pro – Best Budget-Friendly Option
  7. Holosun 508T X2 – Best User-Friendly Design

1. Trijicon RMR Type 2 – Best Overall

Trijicon RM06-C-700672 RMR Type 2 Adjustable LED Sight, 3.25 MOA Red Dot Reticle, Black
  • 3.25 MOA ADJUSTABLE LED RMR: Features an automatic...
  • UNIQUE PATENTED HOUSING SHAPE: Military-grade aluminum...
  • BATTERY CONSERVATION MODE: Automatically adjusts aiming...
  • BUTTON LOCKOUT: Sets RMR into automatic mode to prevent...

The Trijicon RMR offers reliable performance with its durable build and adjustable LED brightness tailored for the SIG P320.

Adjustable LED Brightness: This sight lets you choose from eight different brightness settings, plus an auto mode that adjusts according to your environment. 

Whether you’re at an outdoor range under the blazing sun or inside with dimmer lighting, this sight ensures that you’re never squinting to see your target. Its versatility makes it a must-have, as you can adapt on the fly without messing with a bunch of settings.

3.25 MOA Dot Size: The 3.25 MOA dot is precisely what you need for those longer-range shots. Unlike many red dot sights out there that give you a larger, more cluttered dot, the RMR keeps things crisp and focused. 

This is especially beneficial when you’re aiming at something several yards away. The smaller dot size allows for a higher level of accuracy, ensuring that your rounds land exactly where you want them.

Tough Construction: Let me tell you, this sight is built like a tank. Its sturdy aluminum housing can withstand water up to a depth of 20 meters. 

Plus, its lens is made of tempered glass that resists scratches. This sight’s construction ensures that it endures the recoil of even the most powerful rounds, letting you shoot with peace of mind.

Long Battery Life: Imagine not having to worry about your sight’s battery for up to four years. Yeah, that’s possible with the RMR. Powered by a single CR2032 cell, the sight just keeps going and going. 

So, you’re free to focus on your shooting skills rather than fretting about battery replacements.

Why I Love It: This sight’s durability, along with its flexible brightness settings and precise dot size, makes it my go-to choice for my SIG P320.

My Experience 

Right off the bat, the installation was a piece of cake. It slid right onto my P320’s slide and locked in securely, giving me total confidence.

In terms of actual shooting, the adjustable LED brightness is fantastic. On one occasion, I was at an outdoor range, and the sun was glaring like nobody’s business. 

With a quick adjustment, I found the right brightness setting, and I was back in the game, hitting targets with ease.


  • Durable construction withstands harsh conditions
  • Versatile brightness settings for various environments
  • Long-lasting battery life
  • Easy installation and setup


  • Lack of magnification limits long-distance use

2. Trijicon SRO – Best Wide Field of View

Trijicon SRO Sight Adjustable LED 2.5 MOA Red Dot, Black
  • LARGE, UNOBSTRUCTIVE FIELD OF VIEW: Parallax-free and...
  • CLEAR, CRISP DOT: Fine-tuned, illuminated reticle,...
  • RED DOT PISTOL READY: Designed to fit on many of the...
  • SAME FOOTPRINT AS RMR: Mounts easily using the same...

The Trijicon SRO Reflex Sight is a robust, versatile sight offering a large field of view and user-adjustable brightness settings, ideal for faster target acquisition and better accuracy.

Large, Unobstructed Field of View: The sight’s large, unobstructed field of view is simply a game-changer. This feature is particularly useful in high-pressure, fast-paced shooting scenarios where every second counts. 

A broader field of view means you can keep both eyes open comfortably while focusing on both your target and your surroundings. 

That extra situational awareness can make all the difference in the world. It’s parallax-free and compatible with suppressor-height iron sights, so you’re looking at a highly flexible piece of equipment.

Top-Loading Battery: The convenience of a top-loading battery! It’s a subtle feature, but it makes battery replacement a walk in the park. 

There is no need to unmount the sight from your SIG P320, saving you time and ensuring that you maintain zero. Powered by a single CR2032 battery, you can expect about 3 years of life on medium settings. 

This is extremely practical for those who don’t want to fuss over constant battery changes.

User-Selectable Brightness Settings: The SRO offers 8 brightness settings and three adjustment modes, making it versatile in a wide array of shooting situations. 

Whether you’re out on a sunny day or in low-light conditions, you’ll find a brightness level that’s just right. It even includes settings compatible with night-vision equipment, expanding its range of applications.

Available Dot Sizes: The sight comes in three dot sizes: 1.0 MOA, 2.5 MOA, and 5.0 MOA. The different sizes cater to various needs, from long-range precision to fast target acquisition in close-quarters situations. 

Personally, the 2.5 MOA is my favorite; it’s a great middle-ground for a range of activities.

Durability: Trijicon’s legendary durability is part of the package. With rugged construction designed to withstand serious abuse, the SRO is reliable in the toughest conditions. It’s not just a piece of fancy gear; it’s a workhorse that can handle the grit and grime of real-world use.

Why I Love It: I love the Trijicon SRO for its versatility, user-friendly design, and durability. It’s a well-thought-out piece of gear that checks almost all the boxes for what I need in a sight.

My Experience 

Mounting it on my SIG P320 was a breeze, and the sight held zero even after hundreds of rounds. The wide field of view and crisp dot make target acquisition quick and easy. The user-selectable brightness settings are a huge plus, offering great visibility in any lighting condition.


  • Large, clear field of view
  • Top-loading battery for easy replacement
  • Multiple brightness settings
  • Versatile dot size options
  • Durable construction


  • Could be considered expensive for some budgets


3. Holosun 507C X2 – Best Budget Alternative of Trijicon

HOLOSUN HS507C-X2 Classic Multi Reticle Red Dot Sight, Black
  • INCLUDES: Holosun HS507C-X2 Red Dot Sight | Coin...
  • LONG BATTERY LIFE: Features include Holosun’s Super...
  • ADVANCED TECHNOLOGY: There are 12 different brightness...
  • SHAKE AWAKE: Holosun’s Shake Awake Technology shuts...
  • Holosun optics with Solar Failsafe feature automatic...

The Holosun 507c X2 is a cutting-edge sight featuring Solar Failsafe, Multi-Reticle System, and Shake Awake technology, packed into a durable 7075 Aluminum housing.

Battery Life and Features: Battery life on the Holosun 507c X2 is nothing short of remarkable. With 50,000 to 100,000 hours of battery life, this sight is your long-term companion. 

The Shake Awake feature contributes significantly to this exceptional longevity. It’s ready when you are, instantly lighting up when it senses movement, conserving battery otherwise. No more fumbling with buttons or dials; the sight is as ready for action as you are.

Shake Awake Technology: The Shake Awake tech isn’t just a gimmick; it’s an ingenious function that adds real value. Once the sight detects no movement, it goes into a sort of hibernation, conserving battery.    

Battery Compartment Design: Older models had the battery compartment at the sight’s bottom, requiring you to remove and re-zero the sight for battery changes. 

Brightness Settings: Ten daylight and two-night vision brightness settings provide excellent flexibility. It’s one of the brightest reticles I’ve encountered. The night vision compatibility is an added boon, especially for shooters with astigmatism.

Multi-Reticle System: Here, you’ve got options. The sight offers a 2 MOA dot and a 32 MOA circle. Use them individually or in combination. 

Personally, I like using both for fast-moving targets. The circle adds an element of speed to your aiming, while the dot provides pinpoint accuracy.

Why I Love It: The Holosun 507c X2 strikes a perfect balance between reliability, versatility, and performance. Its array of features makes it adaptable to different shooting conditions and styles.

My Experience

I mounted the Holosun 507c on my SIG P320, and what an experience it’s been! Whether I was at the range or in more rugged outdoor conditions, the sight’s responsiveness and brightness were consistently top-notch.


  • Exceptional battery life
  • User-friendly Shake Awake feature
  • Solar Failsafe for added reliability
  • Convenient side-mounted battery tray
  • Versatile brightness settings
  • Flexible multi-reticle system


  • Slight bluish tint on the reticle

4. SIG Romeo 1 Pro – High Performing Lens

Sig Sauer SOR1P101 Romeo1Pro, 6 Moa 1.0 Moa Adjust, Steel Shroud, Black
  • Molded glass aspheric lens with high-performance...
  • TruHold Lockless Zeroing System that utilizes twin...
  • MOA red dot with multiple brightness settings for rapid...
  • Point-source emitter provides exceptional brightness...
  • Motac (Motion Activated Illumination System)...

The SIG Sauer SIG Romeo 1 is an advanced optic system featuring TruHold Lockless Zeroing, MOA red dot with multiple brightness settings, and Motac for automatic illumination.

Molded Glass Aspheric Lens: The molded glass aspheric lens on this sight is paired with top-notch coatings, delivering unparalleled light transmittance and zero distortion. 

This is a game-changer for those of us who need quick, clear views without fuss. The high-performance coatings ensure that the lens resists scratches and other potential damage, prolonging the sight’s life.

TruHold Lockless Zeroing System: The TruHold Lockless Zeroing System is genius, especially for those using handguns. 

Twin adjustment springs are built to withstand recoil and keep your zero intact, shot after shot. This is crucial in high-stress or rapid-fire situations where a shift in zero can really throw off your game.

MOA Red Dot and Brightness Settings: The MOA red dot is highly versatile, offering multiple brightness settings. 

This ensures rapid target engagement under various lighting conditions. Whether you’re in bright sunlight or transitioning into dusk, you can adjust the settings on the fly for optimal visibility.

Why I Love It: I’ve always been a fan of SIG Sauer products, and this sight is no exception. The balance of advanced features and reliable performance makes it a winner for me.

My Experience 

I decided to mount this SIG Sauer sight on my trusty handgun. The immediate difference was in the clarity and brightness of the reticle. Even in low-light conditions, I could easily acquire targets. However, I did notice that the build didn’t seem as sturdy as I’d like.


  • Exceptional lens quality
  • Reliable zeroing system
  • Versatile brightness settings
  • Efficient point-source emitter
  • Convenient Motac feature


  • Build could be sturdier

5. Vortex Viper – Best Compact Sight

Vortex Optics Viper Red Dot Sight - 6 MOA Dot
  • The Viper Red Dot Sight has a super low-profile making...
  • The Viper's low height allows it to co-witness with...
  • The fully multi-coated, ultra-clear lens offers a wide,...
  • Hard anodized finish- highly durable low-glare matte...
  • Waterproof and shockproof construction ensure your...

The Viper Red Dot Sight offers a super low-profile design, making it best optic for sig p320.

Super Low-Profile Design: The Viper’s super low-profile is not just an aesthetic feature; it serves a very functional purpose. 

The low height minimizes obstruction and ensures a clear field of vision, which is critical when every second counts. This feature comes in extremely handy in tactical situations or competitive shooting, where a millisecond can make all the difference.

3. 6 MOA Dot Reticle: The 6 MOA dot is a delight to use. The size of the dot is just right—not too big to obscure the target and not too small to lose sight of. During my field tests, I found it extremely easy to acquire targets at varying distances. 

The dot is bright enough to be visible in full daylight and has enough dim settings to be useful in low light. This reticle truly offers the best of both worlds, giving you the speed advantage of a red dot sight while still allowing for precise shots.

Power and Illumination Controls: When you’re in the field or at the range, fumbling with controls is the last thing you want to do. The Viper addresses this with its intuitive left-side up/down power and illumination controls. 

Adjusting brightness levels or turning the sight on/off is straightforward and quick. Plus, the controls are well-protected to avoid any accidental adjustments, something I find very useful.

Armortek Coatings and Lens Quality: The fully multi-coated, ultra-clear lens on this sight delivers on its promise of a wide, unobstructed field of view. 

Armortek coatings add another layer of reliability, protecting the lens from oil, dirt, and scratches. This is particularly useful for those of us who shoot in various environments. From dusty ranges to the occasional rainy day, this sight has stood up to the elements remarkably well.

Durability and Construction: The hard-anodized finish not only looks sleek but also contributes to the sight’s durability. This low-glare matte finish holds up well to regular use and abuse. 

On top of that, the sight is waterproof and shockproof. During my testing, it endured recoil, bumps, and even a brief downpour, coming through like a champ.

Why I Love It: It’s versatile, sturdy, and incredibly user-friendly. Whether I’m at the range or in a tactical situation, the Viper Red Dot has proven itself to be a reliable optic system.

My Experience 

I mounted the Viper Red Dot on my SIG P320 and took it out for a spin at the range. Target acquisition was rapid, and the sight held its zero exceptionally well, even after repeated shooting. 

Adjustments were easy to make, and the dot was crisp and bright. The sight didn’t just meet my expectations; it exceeded them.


  • Super low-profile design for easy co-witnessing
  • Bright 6 MOA dot for quick target acquisition
  • Intuitive and protected controls
  • Durable Armortek lens coatings
  • Long battery life


  • Brightness adjustments could be more granular for specific lighting conditions

6. Crimson Trace RAD Pro – Best Budget-Friendly Option

Crimson Trace RAD Micro Pro Compact Open Reflex Pistol Sight with 3 MOA Red Dot, Co-Witness Notch, Shake to Wake and Ambient Light Sensors for Compact and Subcompact Handguns,Black
  • DIMENSIONS: 1.7" L x 1" W x 1" D and a weight of 1...
  • RUNTIME: 20,000 hours of battery life that runs on 1...
  • EASE OF USE: CT Radiant ambient light sensor adjusts...
  • ACCURACY: Sight features 3 MOA red dot reticle for easy...
  • DURABLE: Constructed from aerospace grade aluminum with...

The Crimson Trace RAD Pro is a robust red dot sight with long battery life and a sleek design, making it a compelling choice for the SIG P320.

7075 Aluminum Housing: The RAD Pro really wows you with its solid build quality. It sports a housing made from 7075 Aluminum, adding an extra layer of durability. 

Designed with specific angles on its square top shape, the sight is engineered for high impact resistance.

Its rugged build ensures it can withstand the harsh realities of the field, making it a trusty companion for your SIG P320.

Battery Life and Features: 40,000 hours of battery life? Check. An auto shut-off feature? Yep. Shake to wake functionality? You bet. Battery changes that are fast and painless thanks to a top-accessible battery compartment? Absolutely. 

The battery life and features are truly top-notch. Throughout my field tests, the “shake to wake” feature impressed me the most. It conserves battery without needing manual input, so you can remain focused on the action.

3 MOA Dot Reticle: The 3 MOA dot reticle is in the sweet spot for many of us, me included. It’s bright, crisp, and extremely easy to pick up in various lighting conditions. 

This feature, combined with its Docter footprint, adds versatility, though you might need an adapter plate for mounting it onto your P320. 

During my field tests, the dot was accurate, and sighting was as easy as could be, making it a solid all-rounder in terms of reticle size and functionality.

Water Resistance: Waterproof up to 1 meter, you say? Well, I didn’t go diving with it, but I did get caught in a sudden downpour. 

The RAD Pro didn’t skip a beat. The water resistance isn’t just a spec on paper; it’s a real-world advantage that brings peace of mind when you’re out in the elements.

Ambient Light Sensor: The Crimson Trace RAD Pro features an ambient light sensor, known as CT Radiant, which adjusts the reticle’s brightness automatically. 

The technology functions incredibly well, adapting swiftly to changing light conditions. From the full sun to a dim indoor range, the sight never failed to adjust the brightness level of the reticle effectively, allowing me to stay focused on my target.

Why I Love It: What’s not to love? With a robust build, thoughtful features, and exceptional performance, it checks off all the boxes for what I need in a red dot sight.

My Experience 

Mounting the RAD Pro on my SIG P320 was straightforward, especially with an adapter plate. In the field, it handled like a dream, staying zeroed in through hundreds of rounds, adjusting to light conditions on the fly, and offering a crisp, clear dot that made target acquisition a cinch.


  • Durable 7075 Aluminum housing
  • Long battery life with intuitive power-saving features
  • Versatile 3 MOA dot reticle
  • Water-resistant up to 1 meter
  • Effective ambient light sensor


  • Auto-dim can be a bit too dim in very low-light conditions

7. Holosun 508T X2 – Best User-Friendly Design

HOLOSUN HE508T-RD X2 Multi-Reticle Red 2 MOA Dot & 32 MOA Circle Open Reflex Pistol Sight - Solar Failsafe Shake-Awake Durable Titanium Handgun Sight with Multilayer Reflective Glass
  • HOLOSUN RED DOT SIGHT - The HE508T-RD X2 is a hard-use...
  • MULTI-RETICLE SYSTEM - This Holosun sight is equipped...
  • SHAKE AWAKE TECHNOLOGY - Extends battery life by...
  • SOLAR FAILSAFE - If your battery fails, this red dot...
  • SPECIFICATION - Reticle: Red 2 MOA Dot & 32 MOA Circle;...

The Holosun HE508T combines a rugged titanium housing with advanced tech features 

like Shake Awake and Solar Failsafe, making it a top-tier open reflex sight for the SIG P320.

Grade 5 Titanium Housing: Made from Grade 5 titanium, the HE508T-RD X2 is built to last. In real-world use, I found the sight to be rock-solid, handling bumps and scrapes like a champ. 

Titanium, as you may know, offers an excellent strength-to-weight ratio, which means the sight isn’t going to weigh down your SIG P320. The industry-standard footprint also ensures easy mounting options. 

When you’re out in the field, the last thing you want to worry about is the durability of your sight, and with this titanium housing, you can put those fears to rest.

Multi-Reticle System (MRS): The MRS on this sight is a game-changer. You get a 32 MOA circle with a 2 MOA dot, giving you fast sight picture acquisition. 

I found the larger circle really useful for hold-over references, and it also helped guide my eye to the 2 MOA dot. Whether you prefer the large circle or just the dot, you can customize it to your needs. In practical shooting situations, this versatility makes a world of difference.

650nm Red Super LED: The sight uses a 650nm Red Super LED, which offers up to 50,000 hours of battery life from a 1632 battery. 

The LED was bright and clear in various lighting conditions during my tests. The longevity and efficiency of this LED tech really stand out, especially when you’re in long shooting sessions.

Lock Mode: This feature prevents accidental setting changes. You don’t want to mess around with sight settings inadvertently while you’re focused on shooting.

I activated Lock Mode to ensure that once I had my ideal settings dialed in, they stayed put. A simple but highly effective feature.

Why I Love It: It’s the Swiss Army knife of red dot sights, packing in a multitude of features without compromising on durability or performance.

My Experience 

Mounting it on my SIG P320 was straightforward, and its performance was outstanding. I tested it in various lighting conditions, and each time the sight adapted flawlessly. 

The MRS system allowed me to quickly acquire targets, while features like Shake Awake and Solar Failsafe gave me peace of mind about its reliability.


  • Durable Grade 5 titanium housing
  • Versatile Multi-Reticle System
  • Battery-saving Shake Awake feature
  • Solar Failsafe for extra reliability
  • Long-lasting 650nm Red Super LED
  • Lock Mode to secure your settings


  • Pricier compared to other Holosun red dots

Final Verdict

After numerous hours testing a plethora of red dot sights on the SIG P320, I’ve distilled the list down to the top 7 options that offer a variety of features tailored to different needs and budgets. 

Whether you’re looking for a sight with an expansive field of view, budget-friendly options, or user-friendly designs, there’s something in this list for you. However, when it all boils down, the Trijicon RMR Type 2 stands out as my top pick. 

Its impeccable performance and reliability make it the sight that I, as a professional shooter, trust the most on my SIG P320. But remember, the perfect sight for you will depend on your unique needs and preferences, so weigh your options carefully before making a decision.


What optic can you put on SIG P320?

A variety of optics are compatible with the SIG P320, such as Trijicon RMR Type 2 and Holosun 508T X2.

Will Crimson Trace red dot fit Sig P320?

Yes, the Crimson Trace RAD Pro fits the SIG P320 and is a budget-friendly option.

Can I put a Trijicon RMR on a Sig P320?

Yes, you can mount a Trijicon RMR on a SIG P320 using an Adapter Plate.

Which Sig Sauer is better P320 or P365?

The P320 is easier to shoot while the P365 is more comfortable for concealed carry.

What is the SIG P320 equivalent to?

The SIG P320 is often compared to the Glock 19, both being striker-fired pistols that are reliable and comfortable to shoot. for certain models

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I'm Micheal, an avid shooter and hunting enthusiast from Texas. I'm a recreational shooter who loves to spend time at the range and enjoy learning about new firearms and gears. I love to write about guns and share my passion for shooting with others.

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