I was just shooting my 686 Onyx 20. Shot and functioned fine. Didn’t notice anything awry. Then when I was cleaning it to put it away I noticed a slight metallic sound like something was sliding back and forth when I tipped the gun up and down. With the barrel off it’s definitely coming from the receiver section as I tip it. Seems strange, but like I said, the gun functioned fine. Is this normal? Anyone else got a 686 they can check to see if theirs makes this noise too? It’s easier to hear if you take the barrel off.