The Holosun HS510C and HM3X combo kit in black anodized (part no. 510C+HM3X) pairs the HS510C open reflex sight with the HM3X flip-to-side magnifier for a complete 1x/3x setup, offering a wide viewing window and Solar Failsafe technology that keeps an internal cell topped off with a separate backup battery for triple power redundancy. Holosun equips the HS510C with Shake Awake and a Multi-Reticle System interchangeable between a 65 MOA ring with 2 MOA dot, ring only, or dot only, all projected from a single LED so no re-zeroing is ever required. The kit includes a bonus spacer so the HS510C can run absolute or lower 1/3 co-witness, and the HM3X offers 2.75 inches of eye relief with an adjustable diopter for focus control. Among red dot and magnifier red dot sights combo kits, this HS510C/HM3X configuration favors shooters who want a matched, ready-to-mount setup.

Key Specifications

• The reticle offers a 65 MOA ring with 2 MOA dot, ring only, or dot only, all from a single LED with no re-zeroing.
• The kit includes the HM3X 3x flip-to-side magnifier, extending engagement range on demand.
• The magnifier delivers 2.75 inches of eye relief with an adjustable diopter for focus control.
• A bonus spacer is included, allowing absolute or lower 1/3 co-witness mounting.
• The design includes Solar Failsafe with triple power redundancy and Shake Awake.

Frequently Asked Questions

Does switching reticles require re-zeroing? No, a single LED projects all three reticle options, so zero is retained across patterns.

Can I adjust the co-witness height? Yes, a bonus spacer is included to switch between absolute and lower 1/3 co-witness mounting.

Buy the Holosun HS510C & HM3X Combo Kit

A matched, ready-to-mount 1x/3x setup with triple power redundancy is exactly what this HS510C/HM3X kit delivers. Order it from our Lubbock, Texas gun shop and it ships fast.