What's happened with mine is that the half inch adapter was taken off by a third party when I had some work done on the Rifle...my own fault for not checking it was fully tightened before using & the bloody thing dropped off taking the moderator with it

...no damage to the latter but its taking a small chunk of paint off the end of the coated barrel which drives me nuts as I know it's there!... although it can't be seen when the adapter is on.
I've tried touching it up but can't get the thickness of coating correct... any ideas how I can get around it