Wait a minute. Being stainless, it has to be a MKII. So, all MKII's are control round feed. That means that the head of the case slides vertically up the non-fenced bottom side of the bolt head as the round is moving forward into the chamber, until the vertical movement is stopped by the bolt head rim at the TOP of the bolt. I say, as the OP has indicated, something is wrong with that picture. I am at work now, so I can't go grab one of my 77's to compare.