Glock MOS Adapter Plate for Holosun 509T/ACSS

(1 review) Write a Review
Selected Color is
Adding to cart… The item has been added

This item is made-to-order, please allow up to 5 business days before shipping.


Adapter plate that allows you to mount Holosun 509T or 509ACSS to Glock MOS.


  • Allow the red dot to be mounted in the lowest possible configuration on the slide to reduce height-over-bore, and easy of co-witeness with iron sights.
  • Made of high-strength, Grade 5 (Ti-6Al-4V) titanium. It is several times stronger than low-carbon steel while being lighter at the same time to help reduce the influence on slide cycling.
  • Sandblasted for a non-reflective finish, and electro-anodized to a grey color, other colors available at an additional cost.
  • I can also Cerakote it in Gen 2, NIR-compliant, Graphite Black if you really want it to be black at an additional cost and a few days of lead time.
  • Adapter plate for 509T weighs 10g and 509ACSS weights 9g.
  • 2x M3-0.5x8mm alloy steel Torx screws supplied.


* 509ACSS version will also work for 509T, but there will be a gap in front of the red dot.

1 Review Hide Reviews Show Reviews

  • 5
    Awesome company

    Posted by Jason H on May 31st 2023

    I purchased this without realizing it was not compatible with my specific firearm. 100% my fault but their customer service went above and beyond to help me out. I’ll shop here in the future.