QD vs Direct mount suppressor

[Klem]

I have found that as soon as direct thread starts to heat up it wants to come loose. The suppressor gets hot and expands and so you are having to check tight every few rounds to stop it unscrewing on you. I use a cloth or hat as an oven mit. Doesn't matter how tight you put it on initially it seems to eventually come loose. That is a disadvantage, but it can end up lighter and cheaper with no brake and clamping frills.