Ardupilot Rover has a camera gimbal feature that might make for a good turret controller, if anyone's interested in those kinds of UGVs: https://ardupilot.org/rover/docs/common-cameras-and-gimbals.html

Im not sure if you mean to specifically clone this design of UGV, but if you are interested in more generally any UGV capable of mounting a yeeter on it, then theres a huge number of videos and tutorials on ones that use lower-impact things like airsoft, paintball, or nerf blasters. Plenty of the designs could be altered if necessary too to handle something with more recoil.