An optic plate plus integrated backup iron sights, designed for the Holosun 509T mounted on a Glock MOS full-size slide. Solves two problems at once: gives you a secure mount for the 509T's enclosed-emitter footprint, and provides co-witness backup sights without losing your iron sight picture.
What you get:
Co-witness behavior: Sights are positioned to give you an absolute or lower-third co-witness depending on your front sight height. Pair with a tall front sight for absolute co-witness through the 509T's enclosed window.
Compatibility: Glock MOS full-size — verify your slide is the MOS variant (look for the optic-ready cut and shipping plate). Not compatible with standard non-MOS Glock slides — those need a milled cut first.
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