I ordered two Metal AP's from two different vendors and got two variants as you can see in the image. They each have somewhat different internal menus. For instance, one has 13 firewall options and the other has 5. It was a pain to get one of them to work initially, requiring fiddling in the firewall menu. They are outdoors. One is 2.4 GHz and the other 5 GHz.
I recently had an additional new issue with the "pain" unit (2 barcode labels on the box). I got a new HP laptop (Realtek 8821CE Wifi adapter) for evaluation. Had the odd problem where the laptop would quick connect to the 5 GHz Metal, but with no data flow. The laptop connected fine to other 5 GHz sources, just not the Metal. A real head scratcher. I finally fixed this by carefully going through the Metal menus and fiddling. For "Installation" the 2.4 GHz unit shows "indoor" and "outdoor" (chose "outdoor" in the initial setup). However, the "pain" unit menu shows "indoor", "outdoor", and "any" with a default to the latter. I changed "any" to "outdoor", and that resolved the problem. Whew. Other machines could connect but just not that new laptop. Now everything connects OK at 5 GHz.
Both are running 6.46.6. The differences in the two units continued after a hardware reset of the pain unit yesterday.
For future reference, are there normally a lot of Metal variants floating around at vendors? For one thing, inconsistent product makes cookie-cutter setups difficult. And in this case, one of the units was especially troublesome. in fact, to get the thing to initially work as a WISP bridge out of the box, it was necessary to modify its default firewall settings, a huge pain for someone new to the product. The other unit was easy.