The Holosun lower 1/3 co-witness two-piece QD mount (part no. HSCQD1) is a versatile, durable mounting solution designed for quick attachment and detachment of Holosun 503 and 403 series optics. Holosun equips the mount with a quick-detach lever for easy installation on compatible firearm rails, ideal for fast-action tactical or target shooting environments, and constructs it from rugged 6061 T6 aluminum with a hard-anodized corrosion-resistant finish. The included spacer allows for a lower 1/3 co-witness mount height, aligning the optic with iron sights, and the package includes four installation screws and an Allen wrench. Among quick-detach red dot mounts, this configuration favors 503 and 403 series optics needing fast removal.

Key Specifications

• This mount is designed for Holosun 503 and 403 series optics specifically.
• The mounting height is lower 1/3 co-witness, aligning the optic with iron sights.
• The construction is 6061 T6 aluminum with a hard-anodized corrosion-resistant finish.
• The mount uses a quick-detach lever for easy installation and removal.
• The package includes four installation screws and an Allen wrench for setup.

Frequently Asked Questions

Which optics does this mount fit? Holosun 503 and 403 series optics specifically.

Does this mount include installation hardware? Yes, four installation screws and an Allen wrench ship with the mount.

Buy the Holosun QD Mount, Lower 1/3 Co-Witness

Fast attachment and detachment for 503 and 403 series optics is exactly what this mount delivers. Order the Holosun Lower 1/3 Co-Witness QD Mount from our Lubbock, Texas gun shop for fast, insured shipping.