I’m looking to get some new screws and a tap to help clean out the holes. I think it’s this M3.5 but I’ve seen M3 0.5 which I think is the same. I believe these will work: https://www.mcmaster.com/product/26475A14

The previous owner seems to have used Red thread lock and the screws are small Allen heads so I’ll get to heat and possibly use an extractor.

Glock Gen 5 34 MOS.

Here, use these: Battlewerx screws for Glock

I just replaced all the Holosun SCS optic screws for my department Glocks with Battlewerx screws. They're very high quality. It lists the size as M3 x 0.5 x 8mm

I will tell you from experience, you will be better off sending the slide to Glock to have them remove the screws and clean up the threads rather than deal with the frustration that is sure to ensue. 5 day turn around for us.

Thank you!

The last receipt I could find shows 6-32 x 3/8 FHSCS. Was purchased from Fastenall. .13 cents each. I bought a box of 100 for $13.78. The stickers on the outside of the boxes suck.