11-13-2021, 08:46 AM
Hollis,
You should know by now if that's the gas port.
Measure the distance the bore scope travels down the barrel to that hole. Take it out and lay it alongside the barrel and check if it lines-up with the gas block.
Another way is to run it up and down looking for the port - It will be there.
With unlapped barrels sometimes the gas ports have burrs from the machining process. The first shot will sort that out.
You should know by now if that's the gas port.
Measure the distance the bore scope travels down the barrel to that hole. Take it out and lay it alongside the barrel and check if it lines-up with the gas block.
Another way is to run it up and down looking for the port - It will be there.
With unlapped barrels sometimes the gas ports have burrs from the machining process. The first shot will sort that out.