This is the optics adapter plate for the newly released GLOCK 43X MOS and 48 MOS with RMSc Optic Cut.
This plate is required to mount a Holosun 507k / 407k without having to modify the existing recoil posts on the slide.
The plate is .045? thick. It’s CNC machined from 6061 and Type III black hard anodized.
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