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Holosun HE509-RD Enclosed Solar Powered Red Dot Sight - ACSS Vulcan Reticle

Based on 19 reviews
Condition: New
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$469.99

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Availability: Only 3 left in stock, order soon!
Fulfilled by Primary Arms

Arrives Friday, Nov 13
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At a glance

Condition
New
Model
HE509-RD-ACSS-R
Dimensions
1.78"L x 1.22"W x 1.14"H
Weight
2 oz
Color
Red
Material
Aluminum
Style
Pistol Sight
Warranty
Limited Lifetime
Works with
Handgun

Features 7

  • Holosun 507C footprint with included adapter plate: Ships with a 507C adapter plate compatible with a wide range of optics-ready handguns; measures 1.78 inches in length, 1.22 inches wide, and weighs just 2 oz for a low-profile enclosed emitter setup
  • ACSS Vulcan reticle: Features a large outer circle that guides the eye to a precise 10 MOA center chevron for fast target acquisition. The outer circle phases completely out of the window once properly centered; deactivate the circle for a clean chevron-only view; 1 MOA click adjustments
  • Fully enclosed emitter design: Sealed housing protects the emitter from water, dust, and debris that can disrupt open-emitter sights. Fully multi-coated lens delivers a clear, bright sight window across all 12 brightness settings
  • Hardcoat anodized aluminum construction: Lightweight 2 oz body is waterproof and shockproof. Fully enclosed design prevents lens fogging and keeps the emitter operational in wet or dusty conditions

Description

Notes: The adapter plate for the "-R" version is compatible with the most popular aftermarket slide cut in the industry. It is the same footprint as the Holosun 507C, making it compatible with most plate systems found on factory optics ready guns like the Walther PDP, S&W M&P C.O.R.E., CZ Optics Ready, Agency Arms AOS, FN 509 MRD, and Springfield Armory XDM Elite series handguns. The included 509 adapter plate is not compatible with ZEV or Shadow Systems style RMR interfaces. The 509 ACSS model does not share the same footprint as the 509T (non-ACSS models) and therefore is incompatible with aftermarket mounting solutions and custom cut slides for the 509T (non-ACSS models). The ACSS Vulcan reticle provides a large circle guiding the eyes towards the 10 MOA center chevron. If you are off-center, a portion of this outer circle will appear in the window to give you an instant reference on how to get centered. The circle phases out of the sight window completely when the center chevron is properly aligned in the sight window. Don't need the circle? It can be easily deactivated. The Holosun HE509 Red Dot Sight uses Solar Failsafe technology to power the optic and uses patented Shake Awake technology which senses motion to power the sight on and off. In addition, it “recalls” your last setting and makes sure you don’t lose those customized settings once the sight system turns off. The Holosun HE509 Red Dot Sight offers up to 20,000 hours of battery life. All versions of the Holosun Red Dot Sight system are projected from the same LED, so you don’t have to worry about having to re- zero when changing reticles. NOTE: This optic is not intended to allow co- witness of fixed iron sights EXPORT CONTROLLED ITEMS: These items are controlled for export and may require an export license from the U.S. Government. Buyer acknowledges that Buyer is responsible for obtaining all export licensing authorizations and filing all export documents prior to export from the United States.

Specs 25

Brand Primary Arms
Color Red
Style Pistol Sight
Product Dimensions 1.78"L x 1.22"W x 1.14"H
Sport Hunting
Item Weight 2 ounces
Material Aluminum
Mounting Type Holosun 509 ACSS Mounting Plate

Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Friday, Nov 13

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews


Great optic
Great optic love it. Took off the Trijicon RMR and I’m happy I did !
Reviewed in the United States on September 26, 2026 by E Gonzalez

Expensive but gosh, I love it
As far as far as I’m concerned the Best red dot type site out there. I love the primary arms ring, and the Chevron radical for course or fine aiming.
Reviewed in the United States on August 29, 2026 by TLee

No other red dots compare
So I was vastly skeptical about trying this HoloSun 509 ACSS red Vulcan reticle compared to my other reflex red dots because I wasnt sure how it would function on my P320 XCompact but also because I didn't want a gawkingly huge optic on my concealed carry. This thing never let me down at the range or in the field and looks absolutely amazing. The reticle doesn't get washed out in bright light because it utilizes the solar panels with the battery to automatically brighten the reticle or dim it when needed. You can brighten it dim it manually as well if you'd like. The reticle shuts off after 10mins of non-use and incporates shake-awake technology so it comes on when you pull it up and out of your holster. The chevron can be used to gauge your distance without guessing while aiming high for longer distances. It comes sighted in from the manufacturer and I tested that out with my bore sighter and again at the range. At 25yrds I hit 40/50 shots in my small orange/black target with slow firing. At faster pace firing at the same range I still hit between the 10-8 on the green B27 target. Then repeated the same fire rate on a single white sheet of paper. The optic is deadly and very fast to acquire target. Much faster than align rear and front iron sights, which I've done for over 30yrs. At the very tip of the chevron it's zeroed at 7 and 25yrds. At the inside bottom of the tip it hits 50yrds and between the two arms of the chevron at the bottom is 100yrds, beyond that it's a guess but with a pistol you'll never shoot that far. I love that the emitter is enclosed so it can't be obstructed by anything like snow, rain, dirt, etc. You can rack your gun using the optic off anything, even hard surfaces and really smack this thing around, drop it, bang it around and it still holds zero and works flawlessly. It's the perfect size for pistols and doesnt look big on the gun! It makes anyone's pistol more deadly and made my pistol look menacing! I love this thing! It comes with adjustment tools for the reticle, adapter plate and mounting tools. I had C&H precision send me a filler plate in place of the adapter plate to fill any tiny gaps between my slide and the optic. Phenomenal optic! I'll be getting one for each of my pistols and maybe even my shotgun. See the pictures for more details. ... show more
Reviewed in the United States on March 21, 2024 by Kenneth West

The one optic to rule them all.
Fantastic optic! No other optic comes close to it's ease of aiming in canted or angled offset aiming because of the 250 MOA ring with a chevron. Glass is so crisp that it helps with my Astigmatism. Using various Glock types, I've ran through thousands of 9mm .40 & 10mm rounds with zero optic issues. Holosun (maker of the optic) & Primary Arms (inventor of the large ring reticle) knocked it out the ball park with this one. ... show more
Reviewed in the United States on March 23, 2026 by MG

Mounting screws too long for HE509 to RMR adaptor plate
Mounting screws to Glock RMR plate too long. Came with 6-32x6.2mm. Had to order 6-32x5mm
Reviewed in the United States on October 30, 2025 by Scott C Park

Excellent quality
I concealed carry, & do a lot of range training so an enclosed emitter like this one fit the bill perfectly. It's easy to keep free from lint & dust & the titanium housing is super durable. I over torqued my first one & sheared the screws but holosun sent me out a replacement set right away. Great customer service. Purchased a second one so my carry gun can match my training gun. Great optic for the money. ... show more
Reviewed in the United States on November 25, 2025 by RGF

Great enclosed accs reticle optic.
Why did you pick this product vs others?: Most of my primary dots are holosun ….. especially the accs reticle, it just works very well If your using a MOS mount it was difficult to find one for my g19x. Value for money: For the price compared to other optics it delivers with its enclosed system Build quality: Solid enclosed system Sight quality: Super crisp and clear and accs reticle is perfect Brightness: Lots of bright settings Battery life: Solar and battery keeps it shining for a good time ... show more
Reviewed in the United States on June 21, 2025 by Molon Labe .308

Holosun perfection at its finest
I love this optic. Worth every penny. You won’t be disappointed. Do yourself a favor and buy the C and H precision mounting plate. Glock plate are no good.
Reviewed in the United States on November 16, 2025 by LT
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