Here is a link to the currently offered PSA keymod rails...

https://palmettostatearmory.com/ar-1...uard_type=1716

That link seems to expire/refresh to nothing, maybe this link is better?

https://palmettostatearmory.com/cata...d&category=337

This is close, but not exact.

https://palmettostatearmory.com/2a-a...lrkm-12g2.html

-John