The Holosun Lower 1/3 Co-Witness Picatinny Mount is a purpose-built mounting solution for select Holosun optics. It positions compatible sights at a lower 1/3 co-witness height and provides a stable attachment to Picatinny rails. The mount is described by the manufacturer as constructed from 6061 T6 aluminum with a hard-anodized, corrosion-resistant finish and includes a spacer to achieve the lower 1/3 alignment.
Common applications include range training and competition shooting where consistent optic-to-iron sight alignment is needed, and precision target work that benefits from a repeatable optic height. This mount is focused on reliable alignment and rugged service life for supported Holosun models.
Product Specifications
Compatibility is listed as Holosun 503 and 403 series optics.
Material is specified as 6061 T6 aluminum.
Finish is a hard-anodized corrosion-resistant finish.
Mounting interface is Picatinny rail systems.
Designed height is a lower 1/3 co-witness configuration.
The package includes a spacer to set the lower 1/3 co-witness height.
The description lists the weight as 0.16 (unit not specified by source).
UPC: 760921087497.
Category is Red Dot Mounts.
The mount provides a secure and reliable platform for compatible optics.
This mount is a straightforward, purpose-driven accessory for shooters who need a repeatable lower 1/3 optic height and a solid Picatinny attachment. Its aluminum construction and hard-anodized finish are intended to resist wear in regular range and field use while keeping the optic aligned with iron sights when that capability is required.
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