Glock 509T Milling

2 reviews Write a Review

NOTE: This milling is NOT compatible with the 509t ASCC by Primary Arms. That red dot is longer than the standard 509T, and will not fit in this cut.

This will mill your standard frame size (9mm, .40, 357, ect) Glock for the outstanding Holosun 509T red dot.

This red dot is somewhat unique in that it has a 'closed emitter' system, meaning that the body of the red dot is completely enclosed. This also means that you cannot simply screw it down like you would with an open red dot; this requires a special cut with a dovetail that the sight clamps on to.

With our milling, the bottom of the red dot window is .129" above the top of the slide, so your sights will need to be at least that tall to see through the red dot. You will actually be able to see the tops of your factory height sights through the window, but understand that if you have tritium sights, the tritium inserts will probably be too low to see through the red dot. Pictured here is a Dawson sight at .260" tall, for reference, which is our standard offering for cowitness with this red dot. 

We offer both Cerakote and DLC coatings with this slide work. Please note that DLC adds 2-3 weeks for lead time. All disassembly and reassembly is included with the price, if you include the red dot and/or new iron sights, we will install everything prior to shipping it back. 

Please also be aware that the front of the cut will be slightly angled when you receive it, and there will be a slight gap between the slide and the front of the red dot. This is necessary to install the red dot, since with the dovetail mount, it cannot drop straight down into the cut like most red dots. This will not affect reliability in the slightest, and is largely not noticeable. 


2 Reviews

  • 5
    Perfect Job

    Posted by Kell on Jan 14th 2022

    Turn around time was quick even with the holidays. Work was impeccable. I have no complaints at all. Also best price around.

  • 5
    509t Milling

    Posted by Tyler Sparks on Dec 22nd 2021

    Had my Glock 17 slide milled to put a holosun 509t on it. The job was done quick and the quality is great. Will definitely be using Brimstone’s services again!