Here's a great way to hang them from Hang Fast Targets
The plate protects the hanging hardware from bullet damage.
T Posts are less than 5 bucks and tough as hell
This is a 10" AR500 1/2" target on a short chain section. Very reactive.
This is the same plate on a different hanger that limits movement but is still reactive
Impossible to knock off the hanger.
You can hang multiples on the same post