How can I make a fully functional shooting range target?

So I am currently working on a shooting range project and I got to the hard part. Something I have never done before. I need to make targets with fully functional hitscan weapon detection, as in 10 points, 9 points etc. I’ll deal with the hitscan weapon, shouldn’t be too hard considering there’s lots of tutorials in case I get stuck but I don’t have the slightest clue about how to make a complex hit detection on a circular target and a body shaped target. Help would be much appreciated.