I like bells, so have made a variety with all kinds of things that ring. Nothing classy so I'm not posting pics but I thought this might be of interest.
View attachment 288112 It's a training aid for me for offhand and some FT practice from 30 yds or so. I made some sear type latches and when you shoot through the hole, the flag will latch. It's reset by shooting the upper right disc or pulling the string. The box captures a good bit of the lead. The right 2 holes are 1/2" down to 5/16" on the left. It latches pretty well from 5 ft lb up to about 20 ft lb. It's one of my favorite and most challenging targets.
Nice projects posted so far... enjoyable thread.
Bob