Not in Gwinnett but highly recommend Brad Ward at Full Blown Firearms in Hampton across from Atlanta Motor Speedway. Great group to work with, well pleased with them over the years.
Full Blown Firearms in Hampton across from Atlanta Motor Speedway could do a good job for you. Don't know what area you would be travelling from, might be a bit far.
You can always ask the owner to cover cost and make it right. If they say no, proceed to magistrate court in their county with a small courts claim for damages. All it will cost you is the filing fee and ask for enough to cover the rifle work and filing fee.