Answer
The highest difficulty score McKayla has achieved on vault is 6.5, which she earned for her Amanar vault at the 2012 Olympic Games in London. This vault involved a roundoff onto the springboard, a back handspring onto the vault, and a two-and-a-half twist layout in the air before landing. It is one of the most difficult vaults performed by female gymnasts and requires a combination of power, precision, and control.