This red dot uses the Trijicon RMR footprint standard.

Essential info

• Footprint standard: Trijicon RMR footprint standard
• Reticle: 2 MOA dot & 32 MOA circle [green]
• Window size [height x width]: 22.1 x 27.9 mm [0.87 x 1.1"]
• Total dimensions [length x width x height]: 41.1 x 27.2 x 24.1 mm [1.62 x 1.07 x 0.95"]

Holosun Ronin HE507Comp-GR is a competition-ready open reflex sight that brings the legendary Tu Lam (Ronin Tactics) collaboration into the green-dot space. Built on the industry-standard Trijicon RMR footprint, it is ready to mount on a vast array of optics-ready pistols, rifles, and shotguns. Its defining feature is a massive viewing window paired with an ultra-visible green LED, giving you the ultimate edge in target acquisition speed.

Why choose Holosun Ronin HE507Comp-GR?

This optic takes everything great about the 507Comp series—a rugged body, an oversized window, and flexible reticles—and upgrades it with Holosun’s premium Green LED technology. The green reticle is often easier for the human eye to pick up in bright daylight and can appear crisper for shooters with astigmatism.

Competition-sized window with RMR footprint

Because it uses the standard RMR footprint, finding a mounting plate or an optics-cut slide for the HE507Comp-GR is incredibly simple. What sets it apart from standard micro optics is the dramatically larger window. This oversized glass gives you a 22% larger viewing area compared to standard optics, making it significantly easier to find the dot on the draw and track it during rapid fire.

Advanced Competition Reticle System (CRS) in Green

The optic features the innovative Competition Reticle System, which goes beyond standard dot-and-circle options. It allows you to cycle through various green reticle setups to match the stage or your shooting preference:

• 2 MOA dot
• 8 MOA circle
• 20 MOA circle
• 32 MOA circle

These can be used individually or combined (such as a 2 MOA dot + 32 MOA circle). Whether you need a fine aiming point for precise shots or a massive ring for blazing-fast shotgun or close-quarters pistol stages, the CRS has you covered.

Shake Awake technology

To maximize battery life, the optic includes Holosun’s proven Shake Awake technology. The sight turns itself off when motionless, but instantly powers back on to your last brightness setting the moment it senses movement. It is always ready when you draw your firearm.

Side-mounted battery tray

The side-mounted battery tray makes swapping the CR1632 battery hassle-free. You do not need to remove the optic from your firearm to change the battery, which means your zero stays perfectly intact. Combined with up to 50,000 hours of battery life, maintenance is minimal.

Rugged 7075-T6 aluminum build

Housed in incredibly tough 7075-T6 aluminum and featuring the exclusive Ronin Tactics dragon engraving, this optic is built for hard use. The premium lens ensures a parallax-free, distortion-free view with unlimited eye relief, so your point of aim remains true no matter how you look through the glass.

In short

If you want a competitive edge with a massive viewing window, the flexibility of the green Competition Reticle System, daylight-dominating visibility, and standard RMR footprint compatibility, the Holosun Ronin HE507Comp-GR is a premier choice.