Page 171 of Brophys book shows a picture of the bottom of 3 sets of barrels.The middle set of barrels are described as trap gun with reinforced splinter in ().I have a grade 3e,#9279,matching numbers,and 30 inch barrels with this same reinforced splinter.Are my barrels on my gun trap barrels?If not ,what is the correct i.d. for my barrels?