One thing I noticed re the katana vs barrel. The katana used is a modern mass produced version, of which is not of the same build standard of a katana used in the 2nd World War. As the katana’s produced then was still based on the 65.000 layers as from the time of the shogunate going back hundreds of years. Where the mass produced one’s are basically made the same way that knives are made nowadays. Also katana’s are made from varying strengths of steel and are harden in completely different ways and could take from a few weeks to possibly even over a year. Modern versions are knocked out in on mass in a matter of a hour (ish).
nope gun-to swords were made of railway line they were katana shaped objects to make NCOs feel like samuri with the exception of the handful of ancestral swords carried by scions of ancient families, and even those are just differentially hardened bloomery iron and steel not magic
13:48 they said brace it with your HAND. Not only 3 fingers. Mythbusters proving again they completely miss the point. You need the entire palm and fingers up against the glass.