09-21-2013, 11:02 PM
First thing to do is to make sure that the gas block is lined up with the port. Some gas blocks should be right up against the shoulder, but most should be backed off slightly (carry over from when the handguard end cap was between the shoulder and the FSB). If it is a set screw type, you can flip it upside down and view the gas port through the rear set screw hole. This will show you the proper location of the gas block in relation to the shoulder.
If the gas block is lined up properly, you can try a lighter buffer.
If the gas block is lined up properly, you can try a lighter buffer.