When I said “here”, I meant pistolforum. I’m not sure what specific optic thread… that said the screws I use for the Staccato/Dawson DPO plates are McMaster Carr stainless 6-32 but I need to get my hard drive to get the exact measurement/item number. I just used them to re-mount my 407C on my Staccato P that came back from some warrantee and add-on work.
Optic screws are not necessarily the same across different plates. Some plates may be threaded for different screws such as 6-40 or the plate may be thinner (requiring shorter screws) or thicker (requiring longer screws). There isn’t a ton of standardization right now.
I pulled up my info... The screws I use for Holosun (407C/507C/508T footprint) to the Staccato (Dawson) plate are as follows:
McMaster-Carr 6-32 x 3/8" Stainless Steel (IP10 Drive), part number 92703A253.
I use stainless instead of alloy steel because the Holosun optics require a smaller diameter head than the RMR/SRO and the stainless fits while the alloy steel are too wide to seat consistently, especially with the titanium body 508T.
Between the Holosuns and the RMR, there's a 1/16" difference, so whatever any plate requires for RMR screws, take 1/16" off that and you'll have what you need for a Holosun.
I saw a P with the factory comp today. It was crazy long, no doubt modeled on the Glock 17L!
Likes pretty much everything in every caliber.
I can't imagine running a P with a comp at all let alone that factory one. I have a C2 and tried the threat cadre comp. I could not get the gun to run reliably. It pissed me off so much I ended up taking it off with pliers at the range and tossing it. Because I am a glutton for punishment I decided to try the parker mountain machine comp. It lined up pretty good and looks good, but I won't get to shoot it until possibly this weekend. I did pick up a pack of the factory springs for their comp, so maybe it will work better, but most of the youtube "influencers" claim the PMM comp runs with the factory springs.