The Primary Arms/Holosun HS507K-X2 ACSS (MPN HS507K-X2-ACSS) is a collaboration between Holosun and Primary Arms Optics, bringing the patented ACSS Vulcan Dot Reticle to a lightweight micro reflex footprint.

Key Specifications

• Illumination Color: Red
• Reticle: ACSS Vulcan
• Battery Life: Up to 40,000 hrs on medium
• Brightness Settings: 12, red-illuminated
• Features: Multi-Reticle System, Shake Awake, Lock Mode
• Night Vision Compatible: Yes
• Collaboration: Holosun x Primary Arms Optics
• Model: 507K
• Manufacturer: Primary Arms

Frequently Asked Questions

What is the ACSS Vulcan reticle?

It’s a patented aiming system co-developed with Primary Arms that brings the Vulcan reticle’s aiming references to a micro reflex sight footprint.

How long does the battery last?

Holosun rates it up to 40,000 hours of runtime on medium brightness settings.

What is Shake Awake?

It’s a motion-activated feature that wakes the optic when the pistol moves and powers down during periods of inactivity to save battery.

Buy the Primary Arms Holosun HS507K-X2 ACSS Vulcan Red Dot, Red

See the PA Holosun HS507K-X2 ACSS and more from Primary Arms, or browse our red dot sights category.