Catahoula: I'm not so sure I would even worry about it unless it effects your accuracy. A number of years ago I ordered some Bar-Sto barrels, in different calibers, and every single one of them did the same thing with the link pin. It never affected a thing with either the operation or accuracy of the piece. I called Bar-Sto and they said that if I wanted to send it back they would stake it in place but that a number of their customers perferred to use their barrels as is (was) and that was the way they sold them, or I could stake it in place or leave it as it is. I left it as was and it never affected anything.
Bob_K already mentioned that it operates within a confined, milled space, which means it isn't going to go anywhere or screw anything up.
I wouldn't worry about it. Hope this helps. Mikey.