I wonder where he came up with that set of 28 Ga barrels. I had one but I cannot remember for sure if the barrels were serial numbered. I think they were. Does not look so good, but I do not see where it would be dangerous as long as all the other fits and lockup is okay, other than the barrel outside diameter not matching the receiver. That section of barrel is unsupported anyway. Price is certainly low, but I don't want it.