That thing may leave a gapping hole but the amount of KE required for penetration would be incredible. Not only would it require a lot of KE for its initial cut but it needs a lot of KE to continue cutting and forcing the tissue through the ring.

A stupid little comparison that comes to mind…..a tool my wife bought to remove the core of an apple. It’s a little sharp “razored” ring/tube that is very similar to the razor ring concept. You force it down through the apple, pull it out then push the core out. This comparison may not be “apples to apples” but I know it requires far less force to just slice the apple open with a knife.