Lyman has issued a recall on there Muzzleloader made between 3/1/17-12/22/17 serial number range of A595960-A599026.if you have one immediately discontinue any use due to potential breech plug separation. Contact Customer Service at 1-800-225-9626, M-F 9-4:15 , or [email protected] with all your information and serial number off the barrel. This will be of no cost to you and they will send you the box and packing and shipping label,and you will receive a new barrel and tang.