Since as of now theres no inputs to guns or cannons. I did this by setting the activation group of the mini gun to (targetDistance < 4500)

Step 1: find air target that is further than 2.8 miles.
Step 2: select air to ground mode and hold fire button.
Step 3: while holding the fire button click air to air mode.
Step 4: watch anything that’s targeted come closer than 3.1 miles be auto targeted and anything closer than 2.8 miles get auto destroyed.

Now when their is no targets for air to air, the gun will just fire continuously. So click air to ground and tap the fire button and Vise versa

Technically it’s a small bug that causes auto fire I just figured a way to exploit it for a auto turret like this one.

If step 2 doesn’t work it’s probably because the ships are being targeted in air to ground, move airports.

Here’s a video of it

https://youtu.be/ZTsohzrbPoU