Hand-Picked Daily GUN DEALS, and Exclusive Coupons Codes >>>

Holosun 507C X2 ACSS Vulcan Red Dot Review [Hands-On+Video]

It's a small pistol red dot with a long name...but we took the Holosun 507C X2 ACSS Vulcan Red Dot for a test drive to see how it handled.

Check out the full review of the Holoson 507C X2 Vulcan review above. As always, make sure to check out Pew Pew Tactical on YouTube, as we have loads of other gun and gear videos waiting for you.

While optics on handguns certainly aren’t a new concept, there’s definitely been an upswing in the amount of pistol red dots on the market.

And though I’ve fired a good amount of optic-equipped pistols over the years, I haven’t ever had that a-ha moment.

Mounted Pistol Red Dots
Red dots everywhere.

You know, the one where everything clicks, and you feel like you’ve got a solid improvement over iron sights in your hand.

That is, until I met the Holosun’s 507C X2 pistol red dot equipped with Primary Arms’ signature ACSS Vulcan chevron reticle.

Holosun 507C X2 Primary Arms Vulcan
Holosun 507C X2 with Primary Arms Vulcan reticle.

We dig Holoson and Primary Arms individually here at Pew Pew Tactical, but seeing them collaborate on an optic was something we had to try out.

So, here we are.

We put this red dot to the test to see how it performed and why it kinda made me fall in love with pistol optics.

Available Coupons

Table of Contents


Holosun 507C X2 Features & More

The Holosun 507C X2 offers a low-profile, lightweight, RMR-patterned handgun optic.

That comes partnered with Primary Arms’ signature ACSS Vulcan 10 MOA chevron reticle.

Holosun 507C X2 Primary Arms Vulcan Reticle
Primary Arms Vulcan Reticle

Offering 12 brightness settings in total, this optic sports an aluminum design weighing in at a minuscule 1.5-ounces.

Features-wise, the Holosun 507C X2 ACSS comes chock-full of the goodness you’ve come to expect from Holosun.

Holosun 507C X2 Primary Arms Vulcan Shake Awake
It’s a low-profile design.

Powered by a single CR1632 battery that intelligently loads from the side of the optic housing, the 507C X2 doesn’t force you to remove the optic to swap batteries.

It’s also got a solar cell array up top to detect ambient brightness and adjust your reticle brightness to match in its default “auto” setting.

Holosun 507C X2 Primary Arms Vulcan Solar Panels
Those solar panels detect light and power the optic should your battery die.

Not to mention, it provides an emergency backup power source if your battery bites it.

That said, Holosun boasts a runtime of about 50,000 hours on its middle brightness setting, so you got some time…

Vin Diesel Time

In addition to its automatic mode, the 507 also opts for a manual mode.

In this setting, brightness is dictated via button presses, disabling the automatic sensor adjustments, and a third ‘lockout mode’ where quick button presses don’t do anything at all.

Holosun 507C X2 Primary Arms Vulcan Buttons
Buttons on the Holosun are easy to manipulate.

The optic features “shake awake tech” that turns the optic on if you’ve let it go into standby mode after 10 minutes of inactivity.

You can also conserve a tiny bit of power by disabling the outer ring.

Holosun 507C X2 Primary Arms Vulcan Reticle
Disable the outer ring to conserve battery life.

Because of the 10 MOA reticle size, the Holosun 507C X2 feels easier and faster for newer and intermediate shooters to pick up. And that 250 MOA ring around the outside edges of your sight picture aids in that.

Honestly, it feels almost tailor-made for where my personal skills are as a shooter. At the very least, it addresses the exact issues experience when shooting handguns with red dots.

Holosun 507C X2 Primary Arms Vulcan Reticle
That chevron is very easy to pick up.

And the cool thing here is, if you’re punched out correctly, you actually shouldn’t see the halo portion of the reticle at all. It’s only really visible on the peripheral edge of your field of view if you’ve got the pistol canted incorrectly.

Therefore, if you draw and present the gun but don’t immediately see the reticle, you can still see the circle in the upper edge of the optic.

Holosun 507C X2 Primary Arms Vulcan Reticle
If you start seeing the rim of that circle, you know you need to adjust.

So, you’ll know immediately you’ve got that muzzle canted downwards. This allows you to make a quick adjustment and get that chevron on target.

As someone whose previous experience with handgun red dots usually involves a lot of “fishing” for that tiny point of light, this is a welcome improvement.

Now, here’s the potentially tricky part. It could be argued that features like this present a crutch to new shooters that bypasses core, fundamental aspects of gunslingin’.

Holosun 507C X2 Primary Arms Vulcan
Some people say these are a crutch, but I don’t see them as a problem.

Personally, I don’t anticipate that as a problem.

One of the coolest things about the optic is that it makes it much easier for me to sit there and practice just drawing from a holster and punching out.

More or less, it helps cultivate muscle memory, so, over time, you rely less and less on the optic to make corrections.

Holosun 507C X2 Primary Arms Vulcan Safariland Holster Draw
I think it helps you develop solid muscle memory.

The hope is eventually, you’ll become polished enough that you won’t need that halo for feedback.

Let’s Accessorize!

Obviously, if you throw an optic on a handgun, you need to figure out mounting solutions.

While there are many companies out there offering slide cut services, I kept my setup somewhat simple with a no-frills, RMR-cut ported slide from Brownells.

Holosun 507C X2 Primary Arms Vulcan
I used a Brownells RMR cut slide.

This slide was not only budget-friendly but also in-stock and ready to go. That’s a win!

I also snagged a Safariland 6354DO to replace my older holster that wouldn’t accommodate the gun with the optic.

Holosun 507C X2 Primary Arms Vulcan Safariland Holster
That just looks cool.

And while we’re talking about upgrades, around the same time, I acquired a Tyrant CNC Glock Magwell to round out the package. It’s pretty awesome (and I recommend adding it to your Glock build).

Holosun + Primary Arms: Match Made in Heaven?

With that out of the way, we got the 507C X2 mounted up and ready to go, went to zero it and…

Bam! It’s already there on smaller torso-sized steel at ~20 yards.

Holosun 507C X2 Primary Arms Vulcan Steel Rack
Pinging steel.

I went back and fine-tuned it a bit, but first impressions were very firmly in the “this thing is dope!” category.

As I mentioned, I spent a good amount of time in the week or two leading up to this shoot practicing.

I worked on drawing and presenting the gun from the holster, making small corrections based on the optic’s outer-ring feedback.

It felt like it helped cement that mind-muscle connection just a little bit better.

Holosun 507C X2 Primary Arms Vulcan

The end goal here is working up to getting the reticle on whatever target your eyes are fixed on without having to consciously think through the steps.

I’m a pretty good representation of an okay-ish handgun shooter.

So, the fact that I can spend a minimal amount of time training with a new optic system and come away from the experience feeling reasonably competent is a pretty big plus in my book.

The brightness settings look fantastic!

Holosun 507C X2 Primary Arms Vulcan
Even in the searing desert sun, I could see the reticle.

Even in the mid-day, bright desert sunlight, I had no problems with either the reticle washing out or becoming so bright that it blooms, blows out, or ghosts.

Running our plate rack at a mild pace was a breeze. I placed shots out at 30-yard steel with no issue whatsoever.

Though I don’t have the skill and speed to tackle the RE Factor Tactical Kill Card Challenge, the chevron reticle on this model makes the optic a winning combination.

Holosun 507C X2 Primary Arms Vulcan REI Factor Challenge
Taking on the RE Factor challenge.

Yes, your ballistic values change depending on the rounds you’re running.

But, with 9mm, the very tip of the reticle winds up being your ‘precision’ point of aim if you’re taking carefully aimed shots within 25-yards.

The area just beneath it is your 50-yard zero, and the very bottom of the chevron’s leg is about 100-yards or so.

Vulcan Diagram
(Photo: Primary Arms)

After getting acclimated with the optic, though, I found that the chevron works similarly to an EOTech up close – if you don’t particularly care about shot placement or groups. Just slap that angry triangle on a target and go.

There’s a Downside

If you carefully try to stack rounds in the t-box of a target from further out, the increased size of the reticle compared to your standard red dot means that the chevron might slightly obscure the target.

Holosun 507C X2 Primary Arms Vulcan
Precision shots might be taxing but for training purposes, this red dot works.

This, in turn, could make precision shots a little tricky.

That said, if you’re in the same boat as me – content just hearing that steel ring — it’s probably not an issue.

I see this platform as an excellent trainer for new to intermediate shooters looking to hone their skills.

However, if you’re skills are more robust than mine and you’re driving precision pistol shots on target, this optic might not be for you.

Did Someone Say Night Vision??

The 507C X2 also works great with night vision on its lower-powered setting.

Holosun 507C X2 Primary Arms Vulcan Night Vision
This is just fun.

I’m right eye dominant but run my PVS14 over my left eye. But my brain compensated and combined those two images into an overlay of sorts.

It almost creates a floating, video-game feeling heads-up display effect.

Holosun 507C X2 Primary Arms Vulcan Night Vision

That’s a bit strange at first, but it goes away once you stop thinking about it.

In short, it’s pretty cool to go full operator at the range at dusk with the Holosun.

By the Numbers

Ergonomics: 5/5

Buttons are pretty easy to use when in manual mode and the low-profile design doesn’t stick out like a sore thumb on my Glock.

Features: 4.5/5

It worked and worked well. As an okay shooter, I found the reticle design very useful for training purposes. That said, if you’re a precision pistol shooter, you won’t find a ton of value when it comes to long-range shots due to the reticle covering the target.

Holosun 507C X2 Primary Arms Vulcan Solar Panels
It works and well!

Reliability & Durability: 5/5

Fifty thousand hours of runtime is hard to beat. Not to mention, this red dot performed perfectly on the range. It also survived our test and the brutal desert weather. So, we think this will likely hold its own.

Value: 4.5/5

With prices hovering right around $300 or so, I’d say the 507C X2 with the ACSS Vulcan reticle is worth taking a look at, especially if you fall into the beginner or intermediate shooter category.

Overall: 4.5/5

This feels like a no-brainer addition to my Glock that compliments my current skill set as a shooter quite well.

Available Coupons


I had an absolute blast with the Holosun 507C X2 ACSS, and the inclusion of Primary Arms’ ACSS Vulcan chevron makes the whole package pretty damn enticing for intermediate shooters.

Holosun 507C X2 Primary Arms Vulcan
Definitely worth the money!

The ability to use the optic’s outer ring as a training supplement to build that muscle memory proves beneficial.

It’s also just plain fun to shoot with!

Available Coupons

Again, if you want to see this out on the range, take a look at my video review below.

What do you think of the Holosun/Primary Arms combo? Let us know in the comments below! Looking for more info on red dots, check out our guide on the Best Red Dot Sights.

The Best Gun Deals, Coupons and Finds

Subscribe to Pew Pew Tactical's sales and deals email.

16 Leave a Reply

  • Commenter Avatar

    Great review. I've heard that the regular 507C (32 MOA) is also good on shotguns, like the Benelli M4. How about this newer 507C ACSS Vulcan Reticle - would you recommend it for a shotgun like the Benelli M4? Any particular problems or concerns you see with this kind of setup? Thank you.

    December 27, 2022 9:29 pm
  • Commenter Avatar
    Jared Sergeant

    It’s on sale at PSA right now. Just scooped one up for my (soon to purchase) X-macro.

    December 10, 2022 10:01 am
  • Commenter Avatar
    Tom Flynn

    Would you put this on your EDC? Would you put your life on it?

    August 30, 2022 9:43 am
  • Commenter Avatar

    Just order a Buckmark 22LR pistol. Want a Red Dot sight for target shooting and plinking. Which would be a better option? This Holson 507C or the Vortex Venom. Budget is around $300.

    June 13, 2021 10:02 am
  • Commenter Avatar
    Scott Garecht no

    Forgive me if I missed it, but is it a stand alone optic cut or is it the same cut as a Leopold or something else?

    June 10, 2021 6:47 pm
    • Commenter Avatar
      David, PPT Editor

      Uses the same as a normal 507c, the Trijicon RMR cut.

      June 10, 2021 6:47 pm
      • Commenter Avatar
        Scott Garecht


        June 11, 2021 8:17 am
  • Commenter Avatar
    M King

    I have this optic and although I’ve been to the range with it just once, I love it. I sighted it in so that my POI is just above the chevron and don’t notice any obstruction of my target. I suppose I might if I were to shoot further distances and need to aim at the bottom of the pyramid. I would say your pic of the sight picture makes it look like a typical red dot center circle and suggest you add a second, closer shot of the inverted V reticle so you don’t mislead anyone.

    June 10, 2021 6:26 pm
    • Commenter Avatar
      M King

      As an update, I’ve now been to the range enough that my love for the sight is confirmed. So much so that I’ve bought a second one - green, this time - for a G19 build. It is small and very light weight, the reticle is super fast to find and center even when shooting off-hand (ok, not so fast for me to center off-hand, but that’s a personal skill limitation; finding it is still fast), and I’ve had no failures of any type with it. I’m very happy with it!

      September 7, 2021 3:57 am
  • Commenter Avatar
    Larry Schmidt

    Great review of the 507C X2.
    Would this red dot be a good option for a Ruger Charger 22?

    June 10, 2021 5:16 pm
    • Commenter Avatar
      David, PPT Editor

      Big fan of micro dots on 10/22s!

      June 10, 2021 5:52 pm
  • Commenter Avatar

    "The area just beneath it is your 50-yard zero, and the very bottom of the chevron’s leg is about 100-yards or so."

    So this is really a rifle sight?

    A jury isn't going to buy self-defense very easily with the hostile threat 50 yards away, so a sight with a ACSS Vulcan chevron reticle is a little wasted except for maybe competition and range and hunting. But who knows... I know a guy who was an Air Force Security Policeman (now called Security Forces) who made a 75 yard shot with an M9 (Beretta 92FS for those who don't know) with standard sights and took out a bad guy with an AK-47.

    Anyway... maybe I missed something but the Holosun web site doesn't mention the Primary Arms’ signature ACSS Vulcan chevron reticle for the 507C X2, only mentions the standard 32 MOA circle with the 2 MOA dot. Am I looking at the same thing you are reviewing?

    June 10, 2021 4:11 pm
    • Commenter Avatar

      Never mind, its a stupid question. I needed to look at the Primary Arms site, duh!

      June 10, 2021 4:14 pm
    • Commenter Avatar
      David, PPT Editor

      Micro red dots can be mounted on rifles or pistols. The chevron is a classic multi-range style of reticle that lends itself well to both applications.

      June 10, 2021 4:17 pm
      • Commenter Avatar

        Yes, I know all that. Just pointing out how useless a 50 and 100 yard reticle is on a red dot mounted on a hand gun used for carry and defense. The article is focusing on use for a hand gun.

        June 11, 2021 5:01 am
        • Commenter Avatar

          Nah you're just looking to nit pick for no reason other than you want to sound smart. Why can't you just keep it to yourself? Carry Optics division is something that people compete in, and you're more likely to be shooting in that than you are a self defense situation...if you're at a match and the person who set up the course decides to push a target back to 50 then you're fine. If you set up the Chevron so that the bullets are landing right above the apex of the chevron then you should have the ability to land precise shots, if you don't like the idea then you would obviously steer clear of this product in favor of the standard model or an RMR. Most people looking at this optic aren't even concerned about the ranging capabilities, they care about whether it makes finding their dot faster or not.

          September 4, 2021 1:06 am
Join the community! Log in
Please provide a valid email address.
Password is required.
Please provide a valid display name.
Please provide a valid email address.
The password should contain at least 8 characters with at least one number or special character.
Please accept in order to continue.
Trouble logging in?
Type your email address and we’ll send you a link to reset your password.
Please provide a valid email.
Type your new password and hit button below to confirm it.
Field is required.
Account already exists
We already have an account registered for email address () which is linked to your Facebook account.
To log in type your Pew Pew Meter password below.
Field is required.
Account already exists
We noticed that you have previously logged in with your Account which is linked to the same email address () - we can link both of your accounts together.
In order to link your accounts, hit button below and log in to your Account with the same email as above.

Account in Pew Pew Meter means more

Check what do you get by creating an account
Check and save your reviews!
Bookmark and compare your favorite firearms
Manage your newsletter subscription
pew pew tactical logo

new here?

Personalize your experience.
Select what level shooter you are!

pew pew tactical logo

level up your gun knowledge

Thanks! We'll send you the latest guides and training tips geared towards your level.

pew pew tactical logo


You'll now receive newsletters of our best articles on techniques, guns & gear.

$47 value

yours free!

targets targets

practice targets

printer icon printable

our 9 favorite targets and drills


practice targets

printer icon printable

enter your email to download

We'll only use the information provided according to our privacy policy.

success icon

Ready to Download

Click below to begin your download

download pdf