I would also guess any gas leaving the receiver-ring port would be directly out to the side. Unlike the flange on Mauser bolt shrouds, the port isn't meant to simply deflect gas that makes it around the rear of the bolt, but to provide an exit for at least some of the gas from a blown primer or case.

“Montana seems to me to be what a small boy would think Texas is like from hearing Texans.”
John Steinbeck