Collimator device Holosun HE507C-GR-X2 ACSS Vulcan

Primary Arms by Holosun Micro Red Dot HS507C-GR X2  is a compact red dot sight for handguns, featuring Solar Failsafe solar power, the Shake Awake battery-saving system, and an innovative ACSS Vulcan reticle. This version uses a green LED.

The X2 version includes an upgraded horizontal button layout for easier and more user-friendly operation, as well as a Lock Mode to prevent accidental setting changes.

Primary Arms by Holosun Micro Red Dot HS507C-GR X2 — pistol sight with ACSS Vulcan reticle

The sight body is precision-machined from 7075 aluminum. The device features a lightweight and durable design weighing only 42 g. The sight base uses the popular RMR mounting standard. Unlike the previous version, the X2 series has a new horizontal button layout, which most users find more comfortable and user-friendly. The X2 sight also includes a Lock Mode that disables buttons when activated, preventing accidental changes. The device has a high IP67 rating, making it resistant to weather and temporary water immersion. The aluminum body is hard-anodized for excellent abrasion and scratch resistance.

The Primary Arms by Holosun HE507C-GR X2 pistol sight uses the innovative ACSS Vulcan aiming system.

ACSS Vulcan revolutionizes aiming with a chevron-shaped green reticle (inverted V) instead of a standard dot, allowing fast target acquisition and precise long-range shooting. The reticle is supported by a large circle (optional), which helps quickly center the chevron on the target. If the aiming point is lost, the circle edge helps instinctively adjust and reacquire the target. The ACSS Vulcan sight provides a noticeable advantage over mechanical sights for rapid long-range shooting.

The Primary Arms by Holosun Micro Red Dot HS507C-GR X2 features multi-coated anti-reflective lenses for high light transmission and a clear, sharp, parallax-free image.

Solar power

The sight is powered by a CR1632 battery, providing up to 20,000 hours of operation at brightness level 6. An additional Solar Failsafe panel supports battery operation in bright (sunlight or artificial) conditions, automatically adjusts reticle brightness, and replaces a depleted battery in emergencies. Users can use automatic brightness adjustment or manually select from 10 daytime and 2 night settings.

Battery-saving system

The impressive up to 20,000 hours of operation is achieved by the Shake Awake system, which automatically turns off the dot and puts the device into sleep mode when idle. The reticle reactivates upon movement of the firearm. Users can define the time before sleep mode activates.