What method ensures proper gas port to gas block alignment? Assuming no pins are present, how do YOU ensure that you have aligned the gas block to the gas port?
I usually trust that the gas tube and gas tube hole should get me "close enough" if lined up properly, but I suppose you could be a millimeter out and never know it...
So how do the "pros" do it? Is there a tool? A feeler gauge? Something more precise than the method I use??
