Holosun 403C + HM3X 3X Magnifier Combo - HS403C+HM3X

If you’re looking for the most affordable way to step into a red dot + magnifier setup from Holosun, the 403C + HM3X combo is your answer. It’s been one of the most popular combos and for good reason.

Build Quality & Durability

The 403C red dot is built with a 6061-T6 aluminum housing, a higher-grade material than what most optics in this price range use. Other optics, including the new Holosun ARO, are made of “durable aluminum,” but the 403C’s 6061 construction gives you extra confidence in the optic’s long-term strength. Both the 403C and HM3X are also IP67 waterproof, so they’ll hold up in tough environments without worry.

Solar FailSafe

Where the 403C really shines is in its Solar Failsafe technology. Not only does it back up your battery with solar power, but it also enables auto-brightness mode. Combined with Shake Awake technology, you get a red dot that’s ready whenever you are and won’t waste battery while sitting in the safe. Speaking of battery, it’s rated up to 50,000 hours on setting 6.

Flexible Mounting Options

The 403C includes two mounts, giving you flexibility to choose between an absolute or 1/3 co-witness cowitness. The HM3X magnifier’s mount is also quick-release and ambidextrous, making it easy to swing in or out of view.

Performance & Practicality

The HM3X adds 3X magnification, giving you extended range capability without sacrificing speed up close. The clear glass, generous 2.75” of eye relief, and solid flip-to-side action make it a reliable tool for both range use and practical applications.

Value & Extras

To top it off, this combo even comes in a premium travel case, something you rarely see at this price point.

Final Verdict

This combo is the cheapest way to get into a Holosun red dot and magnifier setup, but it doesn’t feel cheap in the slightest. With premium materials, solar backup, Shake Awake, flexible mounting, and waterproof durability, it punches far above its price range.