Holosun HS510C & HM3X Combo

Holosun HS510C & HM3X 3x Magnifier Combo

The Holosun HS510C & HM3X Combo pairs one of the most feature-rich open reflex sights on the market with a capable 3x flip-to-side magnifier — giving AR-15 and MSR shooters a fast, versatile optic system for close-to-medium range engagements. The HS510C's Solar Failsafe keeps you running even when batteries die, while Shake Awake ensures instant-on readiness every time you pick up your rifle.

Whether you're running 3-gun competition, hunting Colorado big game, or building a home defense AR, this combo delivers the flexibility to engage targets fast at close range and reach out with the flip of the magnifier.

HS510C Features

• Solar Failsafe — runs on solar power in daylight, battery backup always engaged
• Shake Awake — motion-activated instant-on, auto-sleep to preserve battery
• Multi-Reticle System (MRS) — switch between 2 MOA dot, 65 MOA circle, or both
• Open reflex design — large window for fast target acquisition and situational awareness
• Titanium housing — lightweight and durable for field use
• IP67 waterproof rated

HM3X Magnifier Features

• 3x magnification — flip-to-side mount for instant magnified/unmagnified switching
• Compatible with most red dot and reflex sights
• Lightweight aluminum housing

Who Is This Combo For?

The HS510C & HM3X combo is the top choice for AR-15 shooters who want a single optic system that handles both close-quarters and medium-range engagements. It's ideal for 3-gun competitors who need fast transitions, Colorado big game hunters running an AR-platform rifle, and home defense builds where versatility matters. If you're asking "best Holosun combo for AR-15?" or "open reflex sight with magnifier for AR?" — this is the answer.

In stock at Glenwood Springs Outdoors, 831 Grand Ave, Glenwood Springs, CO. Also available to order online.