ACSS Vulcan Reticle Receives Utility Patent

by
posted on December 9, 2021
** When you buy products through the links on our site, we may earn a commission that supports NRA's mission to protect, preserve and defend the Second Amendment. **
Patent Office

The U.S. Patent and Trademark Office has issued a Utility Patent to the ACSS Vulcan reticle system, which is featured exclusively in Primary Arms Optics’  co-branded Holosun HS507C-X2 ACSS mini-reflex sight. The patent was granted to ACSS’ creator, Dimitri Mikroulis, who maintains long-term collaboration and exclusivity with Primary Arms Optics.

Unlike traditional reflex reticles, the ACSS Vulcan features a combined center aiming chevron and a large outer circle. When looking through the sight at arm’s length, this circle falls outside the optic window. However, if the optic is off center, the circle will show the error and provide feedback to guide the user back to proper alignment.

“The design and technology behind the ACSS Vulcan reticle set it apart from anything else on the market,” said Stephen Morgan, director of product marketing at Primary Arms Optics. “This utility patent reflects the ingenuity put into this unique aiming system, which addresses some of the most challenging problems associated with mini reflex sights.”

The utility patent grants protection for the reticle’s unique visual correction system and grants legal recourse should companies inadvertently or deliberately infringe on the design. The innovative system will prove invaluable in high-movement, dynamic shooting applications, where the user might engage a target from an irregular shooting position, such as inverted kneeling, rollover prone or weak-side one-handed. The approach is also beneficial under night vision, where focal settings and device length can limit the visibility and acquisition speed of traditional reflex reticles. Under night vision, the ACSS Vulcan design provides an intuitive ‘heads up’ style reticle view, making it easy to acquire and maintain on target.

Primary Arms Optics was founded in 2008 and is based in Houston, Texas. Holosun has been creating high-quality optics since 2013 and is headquartered in the City of Industry, Calif.

Latest

SDS Arms MAC-5K
SDS Arms MAC-5K

Review: Military Armament Corporation MAC-5K

SDS Arms, under its Military Armament Corporation (MAC) brand, imports Turkish-made roller-delayed handguns of the H&K MP5 pattern called the MAC-5K.

8 New Revolvers for 2026

Despite the incredible array of polymer-frame, striker-fired, semi-automatic handguns on the market, the classic revolver not only refuses to die, it has seen something of a resurgence in recent years.

The Armed Citizen® May 18, 2026

Read today's "The Armed Citizen" entry for real stories of law-abiding citizens, past and present, who used their firearms to save lives.

8 New Semi-Auto Shotguns for 2026

For 2026, the semi-automatic shotgun market has seen even more growth, with some manufacturers expanding their current offerings and other makers entering the marketplace with novel designs.

SAAMI Celebrates 100th Anniversary

For the past 100 years, the Sporting Arms and Ammunition Manufacturers’ Institute (SAAMI) has established the standards that ensure our safety when using modern shotshells, cartridges, firearms and more.

Shooting Is Fun: How I Rediscovered the Benefits of Rimfire

A recent event at Range Ready in Robert, La., reminded us how much fun the simple rimfire firearm can be, whether in handgun, carbine or rifle form.

Interests



Get the best of American Rifleman delivered to your inbox.