9 Best Red Dot Sights 2021 

We have tested & used over 18 different types of optics based on durability, reticle designs, battery life and cost.

Here are the 9 best red dot sights for modern handguns and long guns that the pros are using.

Check them out below:

For Fighting Rifles

eotech exps3 on combat rifles

Disclosure: All products have affiliate links for earning commission to support the website when you purchase

Aimpoint Micro H-1 - Top Of The Line Product

fn scar 17 with aimpoint micro

Why All Pros Use Aimpoint Micro - The Aimpoint Micro is the oldest kid on the block. It's tough, durable and many Tier 1 military units around the world trust and use it.

Insane battery life - It lasts so long that the battery life seems infinite. This means the user doesn't have to switch out the battery at all for 4 years. You never have to worry about the battery running out, it's always ready.

Built like a tank - The Micro series red dot sight is made from 7075 T6 aluminum - the industry's highest material tough standard for weapon parts for surviving physical abuse, recoil and retain zero.

Accepts various mounts - The Aimpoint micro can accept many different mounts from various companies to suit your tactical needs, having a optimized mount helps retain zero and reduce weight.

shooting ddm4v11 with aimpoint micro h1

What guns people use it on - The Aimpoint Micro is the ultimate choice for pistol caliber carbine, fighting rifles and shotguns.

If you want the best, this is it. So be sure to get a discount deal for this expensive optic by going through our link below:


kriss vector with eotech exps3 tan

Why Use The EOTech? This operator grade sight that works for many people including people with astigmatism. It's the go to optic for serious CQB shooters and home defenders within 50 yard distance. 

Unobstructed FOV - Easily acquire the target while shooting on the move, shooting over barricade and around corners.

eotech exps3 aiming steel target

Fast Ranging BDC Reticle - Range a 5'8" tall human size target inside the 68 MOA reticle to quickly estimate relative target distance. In addition, use a magnifier behind the EXPS3 -4 to Engage up to 600 yards

Night Vision Capable - Shoot in the dark with night vision goggles using the NV mode. Not many sights out there have this feature.

CQB Holdover - Use the bottom of the 68 MOA ring for fast close range holdover to compensate CQB sight over bore offset.

Shoot With Both Eyes Open - Widen your situational awareness and not miss anything in the corner of your eye

Read EOTech EXPS3 Review


  • Magnification: 1X
  • Eye Relief: Unlimited
  • Reticle Type: 2 MOA Red Dot
  • Turret : 0.5 MOA / Click
  • Length: 3.1 inches
  • Weight: 4.7 oz

Trijicon MRO - Reduced Tube Effect


Why shooters love MRO - The large field of view with reduced tube effect widen shooter's situational awareness.

Reduced Tube Effect - The tapered body design allows the tube to remain small while giving the shooter a wide view. Sight in at 36 yard for the most combat effect zero

Reduced View Obstruction - Slim lateral body design and top brightness eliminates view obstruction for max situational awareness

Hardened Construction - The optic is built with 7075 T6 aluminum body, the toughest material the industry has to offer, which can withstand a lot of rough handling especially if you like to run your gun hard.

What people think of the MRO - If anything like this exist back then at this price point, it will fly off the shelf almost immediately

For the price, the MRO is a better option for anyone just got started with shooting. If you're new and want something as tough as the Aimpoint but without spending over $800 please check the best price by clicking on the button below.

Leupold LCO  - Best Motion Sensor

kriss vector with leupold lco

Why pick the LCO - Its edgy looking body profile is unique and different from the EOTECH. The sight looks good and performs good on any rifle systems.

Widened Field Of View - The clean outter optic frame gives the shooter max peripheral vision free of knobs and dials, which is great for CQB indoor and outdoor applications.

Adjustable Settings - Adjust through 16 brightness settings to match the lighting situation.

motion sensor leupold lco reticle

Motion Activated - The reticle instantly activates upon triggering the motion sensor, then it turns off when it's sitting at rest. This added feature helps save significant amount of battery.

The optic comes with a built-in cantilever mounting system that can go on any mil-spec rail without any issue. Leupold recommends 60 in-pound when securing the optic on a rifle, and you can do that with a torque wrench.

If you're looking for something different than an Aimpoint or Eotech, the LCO is a great option to get.

CZ EVo3 with Kriss Vector

You can absolutely use those ones for AR15 on a PCC

Holosun optics are our best red dot for the money for anyone looking for durable and affordable red dot or reflex sights.

Holosun 510C - Best Overall

holosun 510c on cz evo s3 sbr
Why HoloSun - HoloSun is proven to work very well in the field and many shooters love it for the performance and price.

Use the Optic As Long As You Want – Increased battery life with the new Solar Failsafe system to to keep the optic working.

Solar Fail Safe - Solar panel extends the battery life longer to keep you in the fight longer even when the battery dies, and it also acts like a fiber optic that turn light exposure into battery power

holosun 510c pov

Faster Transition – Instantly place the dot on the target while shooting on the move or transitioning with both eyes open.

Quick Detach - Mount and de-mount the optic without any tools in the event of optic failure or swapping optic on the go.

Multi-Purpose For Various Firearm Platforms – Use it on any firearm including heavy caliber centerfire rifles

Read Detailed Holosun 510C Review Here 

Sig ROMEO 5 Best Value

sig romeo5 on scalarworks leap mount

Why Use ROMEO5? - The Sig ROMEO5 1X20mm is an robust, compact and affordable red dot optic offering from Sig Sauer. It's a way nicer optic than the Holosun 503.

Motion Activated - The new MOTAC powers up the optic upon any motion, and it shuts down when sitting idle to save battery and last as long as up to 40K hours

2 MOA dot size - Just like the MRO and Aimpoint.

Uses Aimpoint Mount - Any aftermarket Aimpoint footprint mount will work

Check Out More ROMEO5 Pics And Review

Primary Arms Red Dot Best For The Money

Primary Arms red dot sight is affordable and performs well. It's one of the best red dot under $200, and new shooters can quickly get into shooting with a red dot without breaking the bank.

50,000 Hours Battery  – Reliable and long battery life is one of the measurements of the quality of the optic, using only 1 CR2032 lithium battery to power the sight through 11 brightness settings without ever changing the battery

11 Brightness Settings For Any Environment– Flexible options to adjust dot brightness for daytime use, increased versatility with additional 2-night vision settings for nighttime shooting

Shoot Accurately with It Longer  – Built material is an important aspect of a durable optic, increased ruggedness with 6061 T6 aluminum construction to ensure durability and maintain zero

For Pistol Micro Optics

Trijicon RMR Type 2 - Toughest Micro Reflex Sight

trijicon RMR RM07 on glock 17

The Trijicon RMR is the gold standard for micro pistol reflex sights. If you want best, the RMR is the go-to for handgun, rifle, and shotgun usage.

The optic is lightweight, robust and rugged, and it's the best to get.

Better the original - The RMR type 2 has improved its robust build quality to specifically handle handgun slide G force.

Improved battery compartment - More reliable by having a stronger battery retention to hold it in place without getting loose.

Offers 6.5 MOA Dot (RM07) - Bigger the dot, the rounder it is, the more clear it is to shooters with poor vision, and less starburst overlapping the dot.

Check out more large dot size optic here

Holosun 507C X2 - Best RMR Alternative

fn509 ls edge with holosun 507c x2

HoloSun HE507C X2 2 MOA reflex sight is among one of their best high quality budget optics. This is the best alternative for a Trijicon RMR at 2/3 the price.

It uses the same mounting footprint as the RMR, so you can use it on any existing RMR mount. It's among one of the best red dot sights for shotguns, PCC and rifles with a minimalistic overall profile

Side Battery Access - Access the battery from the side. No sight removal is required nor re-zeroing

Never Quit Working – Lasts over 100,000 hours plus solar power, Increased reliability with the Solar Failsafe feature to work continuously even if the battery fails to keep you in the fight longer

Conceal Carry Ready - Saves the last reticle brightness setting to prevent accidental button press

Center Dot + Ring - Switch between a precision dot & cicular reticle for CQB & distance shooting 

Motion Activated Reticle –  Increased battery life with HoloSun’s Shake Awake technology that activate the reticle with the last brightness setting recall to save battery

Read Detailed Review Here

Leupold DeltaPoint Pro - Best For Competition

deltapoint pro fn 509 ls edge

Leupold DeltaPoint Pro (DDP) is the most popular micro reflex optic for competition. Similar to Trijicon RMR, but slightly bigger window like the Trijicon SRO.

Optimized For Competition – Large FOV for fast target acquisition, helps shooter get on target fast and knock down targets to score big!

Top Loading Battery Access – Improved user experience, eliminated the need to remove sight for battery swap, retain zero without re-adjusting

Recoil proof– Increased durability & accuracy, full confidence when mounted on shotguns, handguns and rifles

Read Detailed DDP Review

Trijicon RMRcc - Best For CCW & Single Stack

trijicon rmrcc vs rmr

Why pick the NEW RMRcc - Built on the fundation of the original RMR, the RMRcc is thinner and more compact for micro sized single stack CCW pistols.

This is really the first time in history single stack CCW pistols like the G43X can mount a duty grade optic that people can trust to be rough handled & daily bumps and drops.

Reduced 0.2" for slimmer profile - Fits flush with popular slim profile single stack CCW pistols. The RMRcc is 0.2" slimmer in width than the Trijicon RMR without compromising original CR2032 battery dimension or functionality

No to accidental brightness adjustment - The new Button “LOCK-OUT” Mode secures the setting regardless of bumping or rubbing against clothing when concealed.

Durable for single handed operation - Racking the slide against the optic on hard surfaces for one handed operation. The 7075 T6 forged aluminum housing is super tough

No compromise in durability - Even though the sight is scaled down from the original RMR, the new RMRcc still uses the same grade material, circuitry, functionality and positive MOA adjustment control the RMR is known for

Upgraded electronics - Tighten battery grip to prevent the battery from getting lose due to drops, bumps or repeated recoils to keep working in harsh environments, 

6.5 or 3.25 MOA - 6.5 MOA is preferred for fast eye focus for super close up target acquisition and cleaner reticle for shooters with bad astigmatism 

What To Look For

Red Dot VS Reflex Differences

Most red dot sights fall into the reflex optics category, but not all reflex sights are red dot sights.

The differences are as follows:

Red Dot Sight uses a LED emitted diode and mirrors to project the reticle on the glass inside a tube style red dot sight for aiming.

Unlimited eye relief, zero parallax and aim with both eyes open

Reflex Sight works the same way as a red dot sight, but they are typically open emitter sights like Trijicon RMR, Holosun 510C where the LED emitter is exposed instead of a fully enclosed body design.

Effective Zeroing Range & Accuracy

Different rifle setup and calibers yield different hit accuracy. For the most part, red dot zeros between 25 and 100 yards are the most common.

For a finer zero, use a magnifier scope to get a fine tune the zero.

romeo5 pov red dot reticle on steel target
36 yard zero vs 100 yard zero

For a standard 55gr 5.56mm ball ammo, try the 36 yard zero

If you have a smaller dot like a 1 MOA or 2 MOA, it's absolutely important to get a good zero if the reticle looks blurry due to astigmatism or bad eye sight.

A red dot sight cannot replace fix inherent problems if you have an inaccurate barrel, poor bullet or poor shooting fundamentals.

Dot Size Selection & Astigmatism

Red Dot Sight MOA Sizes

The bigger the dot, the easier it is to pick up to superimpose it on the target for fast engagement.

The smaller the dot, the easier it is to aim precisely at a target far away without covering the target.

It's also a quick fix for shooters with astigmatism, if a big dot still look blurry please check out a prism sight , a larger size MOA dot optic, and please consider seeing a eye doctor.

Be sure to correct your vision or wear glasses to see a crystal clear reticle when using reflex optics.

The most popular red dot size is 2 to 4 MOA and on the market. 

So if you want to reach a 12 inches wide human size target at 100 yards, a 2 MOA is a finer dot size that can get the job done. The further you shoot the smaller your want your dot size to be.

To learn more about prism vs red dotplease click here.

Minute of angle

2 MOA dot will cover 2 inches at 100 yards and 1 inch at 50 yards.

4 MOA dot will cover about 4 inches at 100 yards and 2 inches at 50 yards.

To learn more on this topic, we have a 3 MOA VS 6 MOA article where we break down their differences beyond just the obvious specs. 

Show Me More: Large MOA Optics

Glass Quality

sig romeo5 front lens

Most optics are made up of high quality glass that feature durable coating, optimal light emission angle, eye safety, and parallax-free.

One thing to look out for is to see how much glare there is when the user ups the reticle intensity, which can obscure the sight picture in low light. 

Lens coating also affect light bending for a clear dot.

Long-Lasting Battery Life

holosun 510c battery

50,000 hours of battery life is the industry standard for a red dot sight, and currently most red dot sights can last this long with a single CR123A battery via using advanced circuitry design that wasn't readily available in the past.

A long lasting battery life eliminates the need to replace the battery, and it can stay on and be ready for anything.

Unlimited Eye Relief & Parallax Free

The biggest benefit of a red dot is unlimited eye relief and parallax free, which allows the shooter focus on the target plane without:


Aim around corners, under the car, in tight spaces... super flexible!

You just can't do it with a magnified optic

For CQB targets, just place the parallax-free reticle on target even if the shooter's head isn't completely align with the optic.

The bullet will still hit where the dot is placed. 

However, when optic is tilted like this:

eotech 45 degree leaning left
eotech 90 degree leaning left
36 yard poi 45 degrees leaning right

The point of impact will shift slightly.

Learn more: Cant effect on point of impact shifts

Faster Target Acquisition Speed

fn509 trijicon sro pov in action

A sight with a wide field of view allows the shooter to quickly present the rifle and instantly transpose the red dot reticle on the target and aim both eyes open

Whether you're on the move or transitioning through corners. A red dot sight is extremely fast for acquiring sight picture without using traditional iron sights.

High-Quality Optic Mount 

Scalarworks Aimpoint Micro Red Dot Sight Mount POV

Use a good mount for good zero retention and good cheek weld height.

On average, they cost about $90 – 150 each for a good mount with good aesthetics and rock-solid rail clamp force. Some of the best are made by:

  1. LaRue Tactical
  2. American Defense
  3. Geissele Super Precision
  4. Midwest Industries
  5. Scalarworks

Check out our optic mount guide for more information

Check here to learn how to mount optic on rifles without rail This include great firearms like AK, M14, P90, MP5 and more.

Using An Red Dot With Fixed A2 Front Sight

Trijicon MRO on AR15 with a2 front sight

Fixed A2 front sight is blocking the sight picture. Does it matter?

Not really! here is why.

It's about how you configure the rifle so you can use an red dot with fixed A2 front sight without it obscuring your sight picture.

Check out the hyperlink to learn the 4 ways to go about it.

Drop Proof

Referenced PewpewTactical

The toughest red dot sights are made to withstand roughing handling, recoil impluses and combat field abuse.

Under normal use the shooter is not expected to beat the crap out of the optic for no reason, but when the unexpected happens, these high strength to weight ratio optic won't break.

Under normal use, these bad boys will last a long time!

But the lens still remains a vulnerable spot.

The only way it will break is if you damage the glass straight on with the significant amount of force.

Recoil Proof 


Referenced Larry Vicker

Recoil impulse travels down the gun if you ever have seen any slow-motion videos of a gun firing.

Some guns kick a lot, and you can see the wave travel across the gun, and the optic kind of wiggles around.

This harmonic wave will affect optic accuracy.

Therefore any combat optic has to be able to handle that recoil without losing zero.

Those high-end optics paired up with rock-solid mount can withstand sharp recoil impulse and height drop. So that should give you enough confidence to least buy one already.

High End Optics Alternatives

eotech exps 3 vs holosun 510c

Besides all the Chinese knock-off airsoft scopes, some companies are making WAY better red dot sights on a lower price range.

Holosun Optics, which has compeltely separated themselves among the packs and started pushing its limit for making very-high end mil-spec optics, some are getting close to Trijicon & Aimpoint.

Some optics companies focus on a wide range of optics, and some focus only on a few products to make them dominate the whole market.

Sig Sauer is now officially an optics manufacturers. They have a wide range of optic product from long-range to short-range combat.

Their affordable Aimpoint-like sights such as the ROMEO series are great, but Holosun is our favorite.

Who Uses Red Dot Sights?

People use red dot sights for all types of shooting

  • Home defenders
  • Competition shooters
  • Hunters
  • Collectors
  • Law Enforcement
  • Military

Final Thoughts

When you buy a red dot sight for home defense, you should go for quality that you can trust.

For plinking and casual range sessions, an good optic in the $200-300 range is as good as those $600 couple years back as their qualities continue to increase and the prices are dropping.

In the past you can't get a budget red dot that performs like an Aimpoint, and now you can.

For more please check out more content on our website.

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