Worked one time and i ordered 4 - Presma Adjustable Low Profile Gas Block

Metal shavings inside of the gas tube chamber and inside adjustment threading area.
Cant even notice adjustments literally does nothing worked semi first 100 and onto the next 100 nothing had changed except the charging handle and all of a sudden we’re now a bolt gun with adjustments at 100% there is nothing left to do except close the chamber .
Very odd. Make sure u use plenty of locktite