I honestly cannot say for sure about the gun noise if you are the one shooting as I don't have that experience yet BUT Can say that they pretty much cancelled out the noise of the "Directly Overhead" Low Flying B-52 Bombers that fly over my house every day. I live across the street from the base...At the same time, I was cranking up my music at a good volume with these headphones during that experience. I hope that may help some.