The Holosun 509 ACSS Vulcan Red Dot Sights are enclosed emitter specialty optics co-created with Primary Arms for full size and compact pistols. They come with an RMR or Glock MOS Adapter plate and there are aftermarket adapter plates available also. They feature a 250 outer ring and a 10 MOA chevron reticle. The purpose of the 250 MOA outer ring is to help you "find the chevron" when drawing the pistol. The 250 MOA outer ring is only visible when you do not see the chevron reticle. When the chevron is centered the outer ring is not visible. This acts like an aim assist to help you adjust your grip quickly to get on target faster. Learn more about the ACSS reticle here.

The 10 MOA Chevron gives you an extremely precise aiming point, and also acts as a rangefinder.

The 509 ACSS Vulcan has two panes of glass and a protective hood which covers the emitter. This means debris, water, dirt, lint, or dust cannot get in the way of the emitter and glass giving you extra reliability.

They come with shake awake, have a solar failsafe with auto and manual brightness mode, are IP67 waterproof, and have a 25,000 hour battery life. They have 7075 T6 aluminum housings and clear glass and come with a limited lifetime warranty.

Read our Pistol Optic Fitment Guides to learn which optics fit your gun or reach out to us on chat.