$19.99
This Holosun 510C spacer riser lifts your HS510C open reflex sight to a lower 1/3 co-witness height, perfect for AR-15 shooters running backup iron sights or a magnifier. Machined from 6061 T6 aluminum in a Flat Dark Earth finish to match FDE-optic builds, it installs cleanly between the optic and QD mount.
17 in stock
The Holosun HS510C Spacer Lower is a purpose-built riser for shooters running the Holosun HS510C open reflex sight on an AR-15 or similar rifle platform. Instead of running the 510C at absolute co-witness, this spacer raises the optic to a lower 1/3 co-witness position, giving you a cleaner sight picture while keeping backup iron sights visible in the lower third of the window.
Manufactured from 6061 T6 aluminum, this Holosun 510C riser is designed to raise the HS510C Holosun quick detach mount base from an absolute co-witness height to a lower 1/3 co-witness height with standard AR-15 rifle platforms. The durable riser mounts in between the 510C Sight and the QD mount, and mounting hardware is included. The Flat Dark Earth finish is built to match FDE Holosun optics and firearm builds for a cohesive tactical look.
This spacer is a smart upgrade for HS510C owners looking to dial in their sight picture for use with backup iron sights or a magnifier, making it a great pick if you want a factory-matched FDE finish on your build — Holosun HS510C Spacer Lower 1/3 Co-Witness FDE for sale at Loftus Firearms.
| UPC | 605930625493 |
|---|---|
| Manufacturer | Holosun |
| Manufacturer Part Number | 510CSPACERFDE |
