57 Optics ready slide

I have a ? on the optic ready slide. What optics fit it. I want to know as the doctor print has 2 different ones.

Thanks

I have a Holosun HE407K on mine fits perfect no plates.

From the PSA website:

This 5.7 Rock optics-ready slide is cut for direct mount Shield footprint optics, excluding Leupold Delta Point Pro. Included are two adapter plates, one for RMR optics, and one for Docter cut optics.

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ok I missed that part

Well I do think I will try this one.

Primary Arms SLx RS-10 1x23mm Mini Reflex Sight - 3 MOA Dot

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The new PA site has been having issues with fitment on various platforms even though it is doctor cut. It is too long and needs modification.

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got it. I have had to deal with other platforms with this issue

The Holosun 507K fits perfectly without any adapter plate needed. You just need to cut the factory supplied mounting screws from 8mm to 7mm in length so they don’t bind.

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What is the easiest way to shorten the length 1mm?

File

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A file is the quickest way. Another way is to screw two nuts on the screw locking them together with the 1mm length exposed and file or use a belt sander to cut off the excess length.
For me, with older eyes and less acute motor skills I used a Wire Stripper that has metric screw cutters including M4 I got on Amazon for $20 ( 8PK-CT009 Multi-Purpose Pliers Crimping Tool Metric Size Wire Cutter Cable Stripper ) Expensive but I didn’t want to ruin the factory M4 mounting screws since they have a smaller head than standard M4 torx screws which will not fit flush in the 507K like the factory screws and I couldn’t find any suitable replacements. The screw cutter will recut the front threads of the screw after cutting it and unscrewing it from the screw cutter.

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huge thanks