The Holosun 509 adapter plate for Glock MOS handguns in 9mm (part no. 509PLT-MOS9MM) mounts a Holosun 509 optic to a factory Glock MOS-cut slide without requiring a proprietary milling pattern. Holosun machines the plate from aluminum and finishes it in black anodizing for corrosion resistance and a low-profile look. Among Glock MOS-specific red dot mounts, this 509 adapter is a purpose-built accessory for that pistol platform.

Key Specifications

• This adapter is built for the Holosun 509 optic specifically.
• The fitment is Glock MOS, matching that factory milling pattern.
• The chambering compatibility is 9mm, matching common Glock MOS slide dimensions.
• The construction is aluminum with a black anodized finish.
• The same footprint also accepts Holosun’s 509T and AEMS-MACRO optics.

Frequently Asked Questions

Does this adapter fit a factory Glock MOS slide? Yes, it’s built to mount directly to that milling pattern.

Is this adapter specific to the Holosun 509? Yes, it’s designed for that optic’s footprint.

Buy the Holosun 509 Adapter, Glock MOS

A Glock MOS slide running a Holosun 509 gets a direct-fit aluminum adapter here. Order confirmation and availability updates are handled at checkout, and our Lubbock, Texas gun shop will get it to you with fast, insured shipping as soon as it’s ready.