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AR15.COM
8/31/2025 6:50:34 PM EDT
What are some good options for quality, durable screws to mount dots?

I haven't had any shear, but I can definitely see it happening.  I'm guessing grade 8 would be a good choice, but I'm not positive.  I'd also like suggestions on where to purchase (maybe McMaster Carr?).

I would not mind having a bunch of the most common sizes for future use.
9/1/2025 7:33:13 AM EDT
[#1]
I've had good luck with these:

https://www.ebay.com/itm/125943137369
9/1/2025 1:49:51 PM EDT
[#2]
Quote History
Originally Posted By -CRW-:
I've had good luck with these:

https://www.ebay.com/itm/125943137369
View Quote


Grade 12.9.  I wasn't even aware that that grade existed.  However, I can't find anywhere in the listing on where the screws were made.

In doing some research, I found a couple places where people recommended CAMCAR screws, which are US made grade 12.9.  The high-strength alloy screws that McMaster Carr sells are apparently CAMCAR.   I'm thinking of ordering a 100 pack each of M3, M4, 6-32, and 4-40.  That should cover the most common diameters used.  I have tools to trim them to the proper length as needed.
9/2/2025 2:01:10 PM EDT
[#3]
I use the 12.9 screws from Amazon and cut them with a diamond wheel on my Dremel.  They definitely take a lot of time to cut compared to cheaper screws.
9/4/2025 7:59:10 PM EDT
[#4]
I had factory holosun bottome out on my MOS and had to be drilled out

Got a set of these and super happy
Find specific application

https://www.battlewerx.com/mounting-screws/
PROUD AMMOSEXUAL
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