Thick, thin, it doesn't matter. The barrels and the wood fits back and forth. And I don't believe a word about that "slightly higher grade of steel" business. Why would Rich Cole lie or not know? I don't know about that "bushing the locking holes" in the barrels. My 682X Trap has five sets of barrels. I replaced the locking pin assembly. It just seemed to make more sense. If I bought another one, which I probably never will, it would be a used 686 Sporting for around a grand, not a 682 for twice that much.