Holosun 509 Adapter Plate for Glock MOS - Aluminum Black

The Holosun 509 Adapter Plate bridges the gap between Glock MOS pistols and Holosun 509 series optics, providing a secure mounting solution where direct compatibility doesn't exist. This precision-machined adapter eliminates the guesswork in optic mounting while maintaining the low profile shooters demand.

What Makes This Different

Unlike universal adapter plates that compromise fit and function, this Holosun-specific adapter maintains proper optic height and co-witness alignment. The plate features precise tolerances that eliminate movement between mounting surfaces, ensuring consistent zero retention. Machined from aircraft-grade aluminum, it provides the structural integrity needed for duty and competition use without adding unnecessary bulk to the pistol.

Key Features

• Direct compatibility between Glock MOS pistols and Holosun 509 series red dot sights
• Aircraft-grade aluminum construction with Type III hard anodizing for corrosion resistance
• Precision-machined mounting surfaces eliminate play and maintain consistent zero
• Low-profile design preserves sight picture and holster compatibility
• Includes proper length screws for secure attachment to MOS mounting system
• Black anodized finish matches most pistol finishes and optic housings
• Compatible with backup iron sight co-witness configurations

Field performance remains consistent across temperature extremes and high round counts. The adapter's rigid construction transfers recoil forces directly to the slide, preventing the flex that can cause zero shift in lesser mounting solutions. Competition shooters report maintained accuracy through extended strings of fire, while duty users appreciate the reliability during adverse conditions. The anodized finish resists wear from holster draw cycles and environmental exposure.

Technical Specs

• Material: 6061-T6 aluminum alloy with Type III hard anodizing
• Finish: Matte black anodized
• Compatible Optics: Holosun 509T, 509C, 509A series red dot sights
• Compatible Pistols: Glock MOS models (G17 MOS, G19 MOS, G34 MOS, G35 MOS, G40 MOS, G41 MOS)
• Mounting Hardware: Included screws sized for MOS interface
• Profile Height: Maintains factory optic mounting height
• Country of Origin: Manufactured to Holosun specifications

This adapter represents the most direct path to mounting Holosun 509 series optics on Glock MOS pistols. Professional armorers and competitive shooters choose purpose-built solutions over universal adapters for consistent performance. Stock levels fluctuate with demand from both civilian and professional markets.