I remember shooting my buddy’s AR where it went click but not bang. I kept it pointed down range (on target too lol) and waited for quite a while. After that, cycled the action and noticed a shallow primer indentation - he hadn’t cleaned it in a while at that point in time (lol partially why I’m religious in cleaning my firearms).
Reloaded the magazine and the next round went off. Re-inserted the round and this time it shot no problem.
I certainly didn’t look down the barrel nor stick any appendages in or around the muzzle lol.