I wasn't quite sure whether this should go in the Fighter Development forum or this one...so I went with this one. As far as I can tell, it's full body targeting and shots only count if the arm is in a chambered position prior to the shot.
Some things to observe:
1) Their use of range.
2) Wrap shots aren't just done in medieval sports.
3) Use of body movement to avoid shots.
4) Hand switching.
5) Some (at least to me) impressive acrobatics.