If your desired physical layer diagram is:
Router <-wire-> Device <-radio-> Device <-wire-> PC
Then you're looking for transparent bridging.
The appropriate inexpensive Ubiquiti devices for that are the Ubiquiti Airmax line; you can get all AC (NOT compatible with standard 802.11ac) or all M (802.11n compatible) equipment for ideal matches; or, with an AC line as the access point, M devices can act at stations if the AP is configured that way. Definitely choose the 5Ghz options.
I personally use elements of this product line to punch through walls and floors indoors. Note that the narrower the beam/higher the gain, the more sensitive they are to aim.
Make sure to crank the power way down if at all possible. The newest generation Airmax devices do provide spectrum analysis tools to help you pick the best frequency and bandwidth.