Replacement mounting screws for Holosun 407c/507c

IrishCannon

IrishCannon

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Anyone have any idea what size screws are used to mount a Holosun 507c to the picatinny base, and where to get them? Homeboy I got this from only gave me three and I need four to mount it to the factory pic mount. Was a non-issue because it was on a G19, but I'd like to put this on a lever action and I'd prefer not to spend $70 on an ADM mount for this. I reached out to Holosun and they want all these details on where I got it and stuff. I explained I'd pay for it but they really want to know where it was purchased. I said it was second hand and that wasn't good enough. I didn't know these fasteners were Chinese military secrets.
 
That’s so frustrating when companies are more focused on registering your product than actually helping.

I would take one of the screws down to tour local ACE/TrueValue to get what you need. The big boxes rarely have the small metric sizes.
 
Okay, I will try that. Be good to have some spares anyways. I would imagine it would be easy enough to find RMR screws, but I think the length is different.
 
I just looked at the ones in the box next to me. They included two sizes, both were 6-32, one set of 4 was 5/16", the other set of 4 was 3/8" (may have been 10mm). I think length may be largely dependent on whether you're mounting direct to a slide, or to a plate. 6-32 pitch is the standard for RMR, length likely depends on potential interference under the slide or whether you're fastening to an optics plate or direct to slide.
 
Fastenal
 
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I have extras if you want I can send you a few.
 
Supermatch said:
I just looked at the ones in the box next to me. They included two sizes, both were 6-32, one set of 4 was 5/16", the other set of 4 was 3/8" (may have been 10mm). I think length may be largely dependent on whether you're mounting direct to a slide, or to a plate. 6-32 pitch is the standard for RMR, length likely depends on potential interference under the slide or whether you're fastening to an optics plate or direct to slide.
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Ya this would be attached to the picatinny mount. I currently have it on a plate, but I think the pic mount requires 4 screws
amnesia said:
I have extras if you want I can send you a few.
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That would be rad. I'll PM you.
 
IrishCannon said:
Anyone have any idea what size screws are used to mount a Holosun 507c to the picatinny base, and where to get them? Homeboy I got this from only gave me three and I need four to mount it to the factory pic mount.
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I’d be asking Homeboy for screw #4.
 
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IrishCannon said:
Thanks my dude! I really appreciate you doing that.
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If they’re not the right ones for some reason let me know. I have a crap ton of different sizes.
 
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