I was going to say... if they warranty that neglected barrel, then your a lucky person. Their warranty is pretty clear that it is to the original purchaser of the rifle and they do not cover warranty on alterations, or neglected or abused rifles. If the prior owner abused the barrel by not cleaning it, I would think Thompson Center would be in their legal rights to refuse any warranty work on the rifle. Although they have been great in the past with small odds and ends to me, I have never asked them to warranty an abused barrel like what you're describing.