Best AR-15 Red Dot Sights 2021

So you are in the market for a red dot? Well, it’s not as simple as telling you which is the best red dot sight to buy, or you wouldn’t be on the hunt!

There are many red dots available and while we won’t be able to give you a simple: buy this sight for your gun.

We will provide you with unbiased feedback on as many red dot sights as we can get out hands-on. This post will be forever updated and changed as optics are introduced and/or discontinued.

We want to keep you up to date on red dots because we LOVE red dots.

Best Budget Red Dot Sights

The internet is full of financial shamers. What does that mean? Post your budget AR build in an AR-15 Facebook group, and you’ll immediately be called poor.

That’s stupid.

Lynx Defense is a premium gear manufacturer and what some would call expensive.

But we will never insult someone for buying what they can afford. We hope it’s our products, but we want people to love firearms and gear as much as we do at the end of the day.

People have families, and money doesn’t grow on trees, so obviously, you want to get the most bang for your buck out of whatever you buy, including your gun’s red dot sight.

Let me be clear there is a difference in quality budget red dots and cheap red dots. We will not be including any cheap red dot sights because they are not quality optics.

So let’s dive in. These will not be in order, so read through each one and determine what’s best for you.

Sig Romeo5

The Sig Romeo 5 red dot sight is one of the most popular red dot sights of 2021. The reason for that is actually pretty obvious when you take a deep look into the Sig Romeo5. We even conducted a full Sig Romeo 5 review.

Sig Copperhead
Sig Sauer Copperhead with Sig Romeo5 Red Dot Sight

First and foremost, the price point is fantastic.

Currently, the Sig Romeo 5 is $114.99 on Amazon.

With that price comes a quality red dot for the price—the Romero5 features over 40,000 hours of battery life on the medium setting.

Click the links below to price check these retailers:

Amazon | Sportsmans Warehouse |Cabela’s| Optics Planet | Primary Arms


The MOTAC feature is great to save battery life, and the fact it is IPX-7 waterproof rated makes this a top-notch red dot sight for the price.

This red dot pairs great with any length AR-15 or pistol caliber carbine. I ran my Sig Romeo5 on my Sig Sauer Copperhead. It now lives on my EPC-9 carbine.

Bushnell TRS-25

Bushnell TRS-25 Red Dot SIght

The Bushnell TRS-25 is probably the least expensive red dot sight on the market. It’s the cheapest red dot sight I’d be comfortable recommending to people.

Many people are drawn to the Bushnell TRS-25 because it’s an extremely affordable red dot sight.

Amazon regularly has these for around $50-$70 and actually has a pretty decent set of features.

Bushnell TRS-25 Red Dot Sight

The TRS-25 comes with a 1913 rise block included, which really makes this a bang for your buck.

If your funds are tight and you need a decent optic for the least amount of money possible, grab the TRS-25.

This is an optic you can buy and not feel bad about buying a new optic later and not waste a ton of money.

Don’t go any cheaper than then this optic. This is the bottom of the acceptable optic list.

Click the links below to price check these retailers:

Bushnell | Brownells | Sportsmans Warehouse |Cabela’s| Optics Planet


Holosun HS-403B

If you are looking for a decent middle-of-the-road optic, look no further than the Holosun HS-403B a feature-packed sub $200 red dot sight.

holosun hs403b

This might be the best red for sight for your AR-15! But, let us take a look at why it may be the best optic for you.

The Holosun HS403B is a compact optic with an included riser mount. The only catch is if you don’t like the height of the mount you are stuck with it unless you purchase another mount.

Holosun HS403B

· 2 MOA Dot Reticle
· Up to 50,000 Hours Battery Life (Setting 6)
· 12 Brightness Setting: 10 DL & 2 NV Compatible
· Convenient Tray Battery Compartment
· Parallax-free & Unlimited Eye Relief

52661 HolosunMicroSightDotShakeAwakeHS403B

Click the links below to price check these retailers:

Amazon | Brownells | Sportsmans Guide |Cabela’s| Optics Planet


If you are looking for a red dot sight that’s ready to go this is definitely a good option for you.

There are other Holosun optics that I like a little better due to their similar price and increased feature set.

Primary Arms SLx MD-25

The Primary Arms SLx MD-25 is a 2MOA dot that is near perfect for almost any rifle.

Primary Arms SLx MD-25
Primary Arms SLx MD-25

The ACSS Reticle in the SLx MD-25 has to be one of my favorite reticles. It incorporates the chevron and the horseshoe design to top off the near-perfect combo.

If you are on the hunt for a feature-rich optic that comes with an included mount that packs some quality don’t skip on the PA SLx MD-25.

The battery life for this optic is exceptional and the included riser is near perfect. You can read our Primary Arms SLx MD-15 review in our review section.

Primary Arms SLx MD-25

· 2 MOA Dot ACSS Reticle
· 50,000 Hours Battery Life Mid Setting
· 11 Brightness Setting
· Included riser block

PA SLX MD 25 ACSS

Best Overall Budget Red Dot Sight

I’m not in the business of telling people what will work best for them. This country is all about individuals determining what’s best for them.

I’m just trying to provide you with my feedback and help you come to a decision.

So here’s a hypothetical list of things to consider when making your decision on what budget red dot sight to buy.

  • Size
  • Weight
  • Field of View
  • Battery Life
  • Reticle
  • Features (Shake Awake, included mount, etc.)

So, while it would be nice just to paste a picture of the best overall budget red dot sight, it’s hard to say. Personally, I think the best overall budget red dot sight available right now is the Sig Romeo 5.

An up and company called AT3 also has a decent budget red dot sight called the AT3 RD-50 Pro.

Best High-End Red Dot Sights

High-end red dot sights are all the rage on the Gram! After all, who doesn’t love rocking the best?

I know I do, and I’ve had my fair share of top-tier red dot sights. I really stick to three of my favorite.

Here are the top high-end red dot sights

EOTech HWS XPS2

The EOTech HWS is one of the most popular high-end red dot sight.

honeybadgersd 2
Honey Badger SD with an EOTech HWS-XPS2

But it’s slightly more than just your average red dot. More than average, why you ask?

It’s holographic!

toystorygif

But what does holographic mean? Well, I’m glad you asked.

Basically, without getting all scientific, a holographic weapon sight keeps the reticle positioned in an exact area of the glass. So if you move the weapon left or right, the reticle will stay on target.

This allows for accurate shooting even while moving or if something is blocking your optics view port, such as snow or dirt.

Click the links below to price check these retailers:

Amazon | Cabela’s | Sportsman’s Guide | Primary Arms | Optics Planet


The EOTech HWS XPS2 is my go-to red dot sight if money is not an issue.

I like how the EOTech looks on my guns, and the function and ease of use are top-tier.

Trijicon MRO

The Trijicon MRO came onto the scene in 2015 and has been making the climb to the top ever since.

Noveske N4 PDW 1
Noveske N4-PDW with Trijicon MRO Scalarworks MRO Mount

Trijicon is already a well-known sight and optic manufacturer. I personally run their night sights on my Glock 19.

While most people will know the name because of the Trijicon ACOG optic.

MRO stands for Miniature Rifle Optic, and while it’s not the smallest on the block, it’s still smaller than some of its other counterparts, like the EOTech series.

noveske in case mro
N4 Noveske with 1/3 Co-witness Trijicon MRO

I like the MRO. It’s purpose-built and rugged.

The Trijicon MRO isn’t trying to be something it’s not.

It’s a small package with a wide field of view. The battery life is an impressive 5 years on the medium setting.

The MRO has been put through several torture tests and came through with flying colors.

The mounting options are endless, and from the factory, it comes with several options: no mount, 1/3 co-witness, and full co-witness.

Click the links below to price check these retailers:

Amazon | Cabela’s | Brownells | PSA | Primary Arms | Optics Planet


Aimpoint Micro H-2

The Aimpoint Micro H-1 and I go way back. I feel like I’ve got to say this. The H-1 is like your high school prom date. All pretty, dressed up, ready to go out and possibly make some mistakes and get lucky, who knows.

The Aimpoint Micro H-2 is the new hotness so buy it if you’re looking for an Aimpoint Micro.

aimpoint t2

Anyway. I purchased the Aimpoint Micro H-1 after owning the EOTech 512 for some time. If you know anything about the EOTech 512, it’s bulky.

danieldefense riflecase 1

So getting the H-1 really changed things up a bit. It was a slim, compact red dot sight that I loved right off the bat.

Click the links below to price check these retailers:

Amazon | Brownells | Palmetto State Armory | Optics Planet


What’s the best red dot sight?

Picking the best optic for you is really important. It’s definitely hard to choose because there are so many options, but first and foremost, you want to narrow down your price range.

Once you do that, you can really start to narrow in on what optics are in that price range that will work for you.

Then you can start to look at things like reticles and features such as shake awake, weight, and battery life.

Once you have your price range, you can really break down and analyze what red dot sight is really going to work for you.

In the end, the most important thing is choosing what’s best for you, not what some biased reviewer is going to recommend.

At Lynx Defense, we try to give unbiased reviews, but of course, we can only really comment on the red dot sights that we’ve used. The ones included in this article are the ones that we’ve got our hands on so far.

Now, of course, we’re in an endless battle to try to get more, how we can bring them to you, and try to review them.

How to pick the best red dot for you?

Picking the best red dot for you is probably one of the hardest questions you’ll ask yourself during your search for a sight.

The fact of the matter is that you’ve probably already decided to get a red dot sight.

There are so many options out there that you could either get an LVPO, a red dot, a holographic weapon sight, or just run iron sights.

It really comes down to what will work best for you and your specific use case or mission.

I think it’s imperative to look at all of your options.

Again, as I’ve stated, it’s important to look at your price range and then start from there and narrow down your options.

After you have a price range, it’s pretty easy to find the high end of your price range, the mid-tier, and then the low end. But to figure out what’s truly just marketing nonsense and what’s a fact, you really want to go to somebody you can trust.

The internet is full of reviews. However, you never know who you can trust or who’s just trying to make a dollar. So a full disclaimer, Lynx Defense has obviously created links throughout this entire post. This entire post has pictures, optics, and links to all different places across the web you can buy them. Most of those links are affiliate links. We make a small commission based on what you buy if you use our link to get there. Now, basically, what that entails is if we provided you helpful information, it’s just a reward for us but doesn’t cost you a dime more.

We review all of our optics fairly and give them a fair shake. We are not beholding to any company for any reason under any circumstance. That’s why you’ll see we’ll link to Amazon, to Primary Arms, to EOTech. It doesn’t matter to us. We will link to them if it’s relevant.

We don’t care if you buy using our links or not. So, keep in mind when you’re looking at reviews, and you constantly see the same site or person push the same company over and over again, they could be getting paid for those reviews.

We hear all the time, “I bought this because X, Y, Z influencer said, this was the optic to buy.” When in reality, it didn’t fit their needs at all.

Then they ended up being unhappy with their purchase. That’s not at all what we aim to do here at Lynx Defense. We educate, and then you make the decision based on your needs.

This is why we’re so committed to this particular article and keeping it up to date year after year, month after month, as new optics become available and as we were able to get our hands on new optics.

Obviously, we don’t get a chance to test every single model of every single configuration of every optic ever made.

That would be awesome.

But unfortunately, we don’t have the time or the financial resources to really make that happen.

I really don’t know anybody who does.

So, of course, this post will be somewhat biased in that these are the ones we’ve got our hands on thus far.

These are what we recommend. We’re also going to tell you, and we don’t recommend going below a certain point.

For example, the Bushnell TRS-25 is pretty much the bottom. We don’t recommend going anything below that.

No optic that’s just total plastic, without any metal, it’s out the door.

Anything below the $50, $60, $70 price point of the Bushnell TRS-25 is a no-go for us.

So keep in mind we’re not going to recommend low quality at all. No matter how cheap it is.

We’re not trying to make a buck. We’re trying to educate.

If we can get rewarded for the time we have invested for this by using the affiliate, awesome, but all we really want is for you to learn something from our work.

Red Dot Sight Reticle Options

Red dot sights have many different reticles, and most of the time, the one that is “best” boils down to your personal preference.

There are different schools of thought that some are better than others for target acquisition, but I won’t go down that road.

Single Red Dot

singledot

The single dot reticle is just that, a single dot. That dot can range in MOA and crisp-ness.

Low-end optics could see a lot of distortion around the dot, where high-quality optics should have a crisp and clean dot.

The dot can range anywhere from 1-6 MOA.

Circle Red Dot

Circle Red Dot Reticle

Circle dots reticles have a circle around the center dot.

These have much faster target acquisitions since you can place your target in the circle for faster but less precise hits.

Personally, this is one of my favorite reticles.

Ranging

range dot

Ranging reticles don’t have a standard look. They can vary in shape and size, and function. But the purpose of them remains the same, and they help you adjust your optic for shooting longer or shooter range.

You don’t see this reticle often in AR-15 red dot sights.

Multi Red Dot

multi dot

Multi-dot reticles are pretty much what they sound like, multiple dots. Typically multiple dot reticles are used for ranging.

The top dot could be sighted in for 50 or 100 yards, and then you would be able to determine what your bottom dot would be at 150 – 200 yards.

These reticles are popular in EoTech HWS (holographic weapon sights).

Horseshoe/Dot

chev half circle

The horseshoe dot reticle is similar to the circle dot reticle. The minor difference of the circle being open at the bottom creates a horseshoe instead of a complete circle.

Like the ACSS-CQB reticle from the Primary Arms MD-25 above, the center dot is a chevron and not a plain dot. The horseshoe/dot reticles can interchange the center dot and over have ranging dots below the larger center dot.

Crosshair

crosshair

The crosshair reticle is also not a common red dot reticle. These are typically found in magnification scopes. Some lower-end optics, like NcStar, feature these types of reticles.

Chevron

chevron

Chevron reticles look like an up arrow without the tail. This is a reticle popularized by the Trijicon ACOG optic.

What is an MOA Dot?

You often see MOA, which means “minutes of angle,” all over red dot optics product pages.

MOA is a unit of measurement of a circle and is used to determine the size of the dot and how much it will cover your sight picture at a specific distance.

MOA dots usually are between 2 – 6 MOA, and the smaller the number, the less the dot will cover your target.

Other Optic Options

If you are looking for something more than a red dot you might want to look into getting a Low Power Variable Optic (LVPO) like the Vortex Strike Eagle.

If you want to have a more manual optic you can get back up flip up sights in case your battery dies or optic fails.

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