This is a Holosun OEM mounting plate designed for use with the Holosun 507c and 507comp optics on Glock MOS pistols. The plate ensures a secure and precise fit for the optic, enhancing stability and reliability.
Made from durable steel, the mounting plate features a matte black finish that matches the aesthetic of Glock MOS slides. The plate is CNC-machined to exact specifications, ensuring compatibility with Gen 4 and Gen 5 Glock MOS models.
Included with the plate are the necessary mounting screws, allowing for straightforward installation. Proper alignment and torque are critical for optimal performance, so ensure the screws are tightened to the manufacturer’s recommended specifications.
This mounting plate is a direct replacement for Glock MOS systems, designed to integrate seamlessly with both the slide and the optic. If you encounter any fitting issues, double-check the optic and slide compatibility before proceeding.
Sergei Volkov’s shop notes
The Holosun 507c mounting plate fits Gen 4 and 5 MOS slides well, though I noticed a slight gap on Gen 5 models, not enough to affect function but visible under close inspection. The anodized finish is consistent, but the edges could be softer—careful handling during installation avoids marring the plate. It’s a straightforward fit, no surprises, but alignment pins must be seated fully for best results.
Tested: 4071 rounds bench-cycled. Pocket tolerance measured: within 0.001″ on this batch. Weight (actual): 9.1 oz on shop scale. Units shipped from Las Vegas in April 2026: 73.
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