Up for sale is an Agency Arms Glock 48 field slide. I have approximately 250 rounds on this setup with stock Glock barrel (Agency didn't make a barrel for this when it built out, but I believe they do now). Not in a bind to sell, I just find myself carrying Agency 43X more often. $1100 shipped to the continental USA.
As for the optic cut this is not the Agency Arms AOS cut, but a dedicated optic cut. To my knowledge, someone can correct me if I'm wrong, but on these subcompacts (Glock 43 and 48 models) they have the Holosun 507k cut which also fits a Shield RMS I believe. Compacts (think Glock 19) and full sized Glocks have enough slide width and can get the AOS cut.
I don't get notifications of IM's, but email from this site seems to reach me. Cross listed. PayPal FF (no comments), Venmo (no comments), or Zelle accepted. Thanks.