Interesting. I have the rear half of a bolt sent from a guy in Florida from a new No.4Mk.2, sn. A956 broken completely in half in the exact same place. It was a hot reload that caused the failure on this one. It blew my mind when he sent it. I'd never seen anything like it before.

The top of the bolt handle on the pictured bolt has been dished out to clear a scope at some time. I've seen them done like that before.