8 Large Window Red Dot Sights

In this guide, let's check out some of the 8 best large window red dots sights for pistol and rifle use

Get good optics that will NOT lose zero, check out these proven products below:

For Pistol Use 

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Trijicon SRO - Best Overall

Overall Window Size: 1X24mm

fn509 trijicon sro pov in action

Why we picked this one - The SRO uses the same RMR footprint to fit any existing RMR optic cut slide. If you want large FOV for better dot tracking performance, the Trijicon SRO is the way to go.

Same RMR mounting footprint - Using the exact Trijicon RMR mounting footprint keeps everything compatible without having to buy special accessories.

Not Lose The Dot - Acquire the dot fast and consistent even if you're slightly off center with full arm length pistol draw

Automatic Mode - Improved brightness control system to lock the mode for conceal carry

Various Dot Sizes - Choose from 1 MOA to 6.5 MOA. 6.5 MOA is highly recommended for pistol use

Top Battery Access - Load/Replace battery right from the top! No sight removal or re-zero required

Better Follow Up - Reacquire the dot much faster after each follow-up shots, and waste no time finding the dot

Read Trijicon SRO Detailed Review

Leupold DeltaPoint Pro - Best Lens Hood Protection

Overall Window Size: ~1X25.7mm

deltapoint pro parallax

Why Use The DeltaPoint Pro - This sight has similar FOV size as the Trijicon SRO but in a retangular shape. This is Leupold's best selling micro red dot sight for pistol and rifle use.

Larger Window Than RMR - The first well known handgun optic in the market with a large window for faster target acquisition speed.

Extra Housing Protection - Lens hood protects the main optic glass frame from direct impact to increase the durability  

Easier Battery Access - Load/Replace battery right from the top

6 MOA - 6 MOA dot size is now available for pistol applications. Works better for shooters with astigmatism

Swampfox Liberty - Unique FOV Design

Overall Window Size: ~1X27mm

glock 17 red dot swampfox liberty

Why we picked this one - The Swampfox Liberty uses the same RMR footprint to fit on any existing RMR optic cut. The FOV gets bigger on top without increase the base width of the optic.

swampfox liberty vs justice

Track The Dot Better - Wide 1X27mm FOV helps dot tracking within the window.

Skeletonized Body - Weight reduction and fits most optic ready holsters including ALS series duty holsters

Shake Awake - IMotion sensor activates the optic reticle when in motion (Even just a small tap)

Top Loading Battery - Same user friendly design as the Trijicon SRO

Sig ROMEO3 MAX - Unique FOV Design

Overall Window Size: 1X30mm

The Sig ROMEO 3 MAX 1X30mm is an product in direct competition to the Trijicon SRO around the same time they were released. 

This open reflex optic is designed for competition (influenced by Max Michel) use that features similar large circular window like the SRO.

The run time is about 20K hours (uses CR2032 battery) shorter than the Trijicon SRO, but the rest of the optic features similar specs.

3 and 6 MOA dot size are available.

As far as for users with astigmatism who want bigger dot sizes, the 6 MOA dot size is a better option.


For Long Gun Use

Trijicon MRO - No Tube Effect

Overall Window Size: 1X25mm

Trijicon MRO on CZ Scorpion

Why Get The MRO - The MRO is as strong as the Aimpoint Micro, but with bigger field of view at a cheaper price point. It accepts all types of aftermarket mounts to make it work on your gun.

Reduced View Obstruction - No view obstruction on the sides due to turret or brightness adjustment knobs. It's also ergonomical for lefties and righties.

Reduced Tube Effect - The tapered body design allows the tube to remain small while giving the shooter a wide view.

Battle Proven Durability - The 7075 T6 aluminum body survives rough handling, drops, recoils and kicks

Holosun 510C - Best For The Money

Overall Window Size: ~1X32mm

holosun 510c pov
This is the hot selling item - HoloSun 510C is low drag and low weight open reflex sight for PCC and rifles. It's reasonable price tag makes it a great option for beginner or intermediate users.


Find Target Fast - It's very helpful when shooting on the move or transitioning with both eyes open thanks to the large viewing window that doesn't obstruct shooter's view.

Flexible Head Movement - Parallax free reticle stays on target accurately even if the shooter's eye shifts off center horizontally or vertically.

Versatile Reticle System - Use the 65 MOA reticle circle for range estimation

Holosun AEMS - Unique FOV Design

Overall Window Size: 1X28mm

holosun aems red dot sight

The AEMS is Holosun's newest large window enclosed emitter red dot sight (IPX7 rated). In many ways, this product will set the new standard for Holosun rifle and PCC red dot sights.

Smaller Profile - AEMS is small and almost look like an Holosun 509T for PDW type rifle setup

Lens Cover - Included both front and back see through lens cover

7075 T6 Construction - Built with materials stronger than the standard 6061 T6 aluminum

Motion Sensor - It features the same MOTAC system as many Holosun products

Green or Red Reticle - Pick the reticle color you like

CQB Ring Reticle - 2 MOA center dot with the option to turn on the 65 MOA ring for range estimation and mechanical offset

Steiner R1X  - Unique FOV Design

Overall Window Size: 1X32mm

steiner r1x reflex sight

The Steiner R1X is one of a kind red dot sight that's compact and beefy looking. The R1X reduces the “tunnel vision” of hard-focus iron sights for quicker target acquisition, enhanced accuracy and greater situational awareness.

Other Mentions Worth Checking Out

Holosun 507C ACSS - Best Dot Tracking Reticle

Overall Window Size: 1X23mm

acss vulcan reticle pov

The Holosun 507C ACSS has a similar size window as a Trijicon RMR, but it's ACSS Vulcan reticle is design to help shooter find the reticle faster without increasing the window size.

The whole point of a big window red dot sight is to have wider field of view and to track the dot better. The ACSS Vulcan reticle is an unique design worth checking out

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