This is a wallmount for the Ubiquiti UNAS2.
It has a perforated bottom for ventilation and a hole to route the network cable
The mounting holes are designed for M3 countersunk screws.
Overall it has a snug fit and offers enough resistance that the NAS cant easily fall out of the mount.
Original Onshape document
UPDATE 2026-01-07:
Added version that uses less material but should be just as strong
The author marked this model as their own original creation.