Originally Posted by 1QwkSport2.5r

While true, most of the ringed engines with pinned rings I've had apart have a bridged exhaust port. One has to consider the transfer ports as well - many liners I've seen have transfer ports that are longer horizontally than they are vertically. While the exhaust port is often the widest port, that isn't the only one that would be wide enough to snag a ring. In the case of my Fox .50 and likely most other B-case Foxes, the transfer port is split into two narrow ports running vertically at an angle as well as having a bridged exhaust port.