A rifle came to me missing one of the pins retaining the front of the barrel. While replacing the pin seems simple enough, the stock over each pin has been filled with a grey material. Even with the missing pin, the fill is present on one side but absent (which I'm guessing is why the pin is gone) on the other side. Before removing any of the material to try to determine what it is, thought to ask if someone might know.
Could it be specific to the builder, Al Edge?
Could it be specific to the builder, Al Edge?