Holosun HS507K-X2 Compact Pistol Red Dot Sight - Red ACSS® Vulcan® Dot Reticle

Manufactured by Holosun
Manufactured by Holosun
7 Reviews

In Stock

Standard orders will ship out in 1 business day (M-F) if ordered by 3:30 pm CST. FFL orders will ship within 5 business days or less as long as we have the information for the transfer destination. NFA items will take longer to ship and are dependent upon ATF processing times.

For individual Officer, First Responder, and Military pricing please make sure you are logged in. for details



Made as a collaboration between Holosun Optics and Primary Arms Optics, the red-illuminated HS507K-X2 with patented ACSS® Vulcan® Dot Reticle brings the revolutionary Vulcan aiming system to a micro reflex footprint.

Designed for concealed carry, the HS507K-X2-ACSS is lightweight, durable, and dependable, with up to a 40,000-hour runtime on medium settings. This sight retains all the core features and technologies of the standard Holosun model, including the Multi-Reticle System, Shake Awake technology, and a built-in Lock Mode. With 12 red-illuminated brightness settings and intuitive push-button controls, the HS507K-X2-ACSS works in any lighting condition and is even compatible with night vision devices.

  • Red-Illuminated patented ACSS® Vulcan® Dot Reticle System
  • Ultra-compact size for concealed carry applications.
  • Two Reticle Settings: Dot + Circle, and Dot only
  • Shake Awake™ - Motion on with last setting recall.
  • Parallax-free, unlimited eye relief.
  • CNC milled 7075 Aluminum Housing.
  • 10 daylight and 2 night vision compatible brightness settings.
  • IP67 Certified.

This co-branded optic features the patented ACSS® Vulcan® Dot reticle system, which improves acquisition and recovery speed through its patented outer reference circle. When aimed on-target, the ACSS Vulcan Dot reticle appears as a simple, unobtrusive 3 MOA dot. When your aim is off-target, the edge of the 230 MOA outer circle guides you back to center. ACSS Vulcan Dot alleviates one of the main weaknesses of micro reflex optics, ensuring you can always find your reticle aiming point, despite the smaller optical aperture.

This version of the optic uses RED reticle illumination. Red illumination is better for low-light and nighttime as it preserves your natural night vision. Red also contrasts more against many natural backgrounds, such as dense foliage. For GREEN illumination, the HE507K-GR-X2-ACSS offers the same features but with a green LED emitter.

The HS507K-X2 with ACSS Vulcan Dot Reticle features an RMSc footprint and is natively compatible with many of the most popular concealed carry pistols.
See More


Battery Life25,001 - 50,000 Hours
Battery TypeCR1632 3V Lithium Coin
Brightness12 Settings
Click Value1 MOA
FinishHardcoat Anodized
MaterialAluminum - 7075-T6
Night Vision CompatibleNight Vision Compatible
Reticle ColorRed
Warrantylimited lifetime
Weight1.0 Oz
California Prop 65 warning

 WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information go to www.P65Warnings.ca.gov.

Ratings & Reviews

7 reviews

  • 4 stars
  • 0 reviews
  • 3 stars
  • 0 reviews
  • 2 stars
  • 0 reviews
  • 1 star
  • 0 reviews

Crisp dot and works great!

by -

Initially I thought this was the ACSS chevron radical. To my surprise, it was not. After my trip to the range, I was impressed on how quickly I was able to find the dot with the outer ring. I would highly recommend this product to anyone interested in a red dot optic.

Holosun 507K ACSS Reticle

by -

Exaclty what i'd been waiting for...a lightweight K size dot with the PA ACSS reticle. Very happy with it!

Works as advertised

by -

It was remarkably easy to find the dot and put it on target.

Great compact Red dot

by -

Amazing red dot with ACSS - a must have for single stack or compact pistol for conceal carry. 30 years military experience with weapons and this new technology is the best.

Great Compact RDS

by -

This RDS is super for a carry pistol. Since the window is small, it is very convenient to have a circle around the dot to make acquisition of the red dot easier.

I have no idea why I waited to buy this...


Just buy it, you're not going to be disappointed. I'm at least a half-second faster on my draw to first shot time and I literally slammed it on the table at the range like a hammer at least a dozen times before putting down a 2" group at 40ft with a Glock 43 as if I was trying to get that PA sponsorship. She's good to go guys.

Great reticle

by -

First experience with ACSS reticle. Great improvement.