08-10-2021, 06:28 PM
Most gas blocks with set screws have the rear threaded set screw directly across from the gas blocks inside port hole. If yours is this type of gas block, then remove the set screws and put the bottom of your gas block"set screw side" directly over the barrel's gas port. Line the rear set screw hole directly over the barrel's gas port. This will give you the distance needed between the barrel journals shoulder and the gas block. You can use a feeler gauge to get the exact distance needed between the gas block and barrel shoulder to line up the gas block and barrel port....