wjsmall97, take a closer look at post number 6 as the others have said. From what I can see as I have never seen or held on of those strikes, the chamber is over sized and the breech plug is fitted in permanently but that breech plug looks to be more of a receiver than a plug. The actual plug is the adaptor and it is sized to the barrel dimension. In other words, you pull that adaptor and you will be looking at a .50 caliber hole. It does pay to look close and pay attention.