dumb question, can you hear the steel gong out 75-100 yards?
Yup out to 1000 and IF you mount your swingers with movement, you can see the "flash" when the steel moves. I use these from Hang fast and 3 link pieces of chain:
https://hangfasttargets.com/steel-targets/standard-hanger/It's pretty ingenious and the mount has cutouts to act as a wrench.