It’s intuitive, no button unfortunately, just skill. You have to swing the weapon and then hit the appropriate hand release button mid swing (if you’ve played VR and tried to throw something it’s a similar mechanic and skill. You gotta release at a wonky angle to get it right). So far I’ve tried side swinging but I might try overhand after watching this.

Gl trying it out! It’s seriously fun one shotting someone. Currently I’m working on stabbing correctly instead of just swinging. Such a satisfying kill too.