[ST01-015_p4] - Gum-Gum Jet Pistol (One Piece Promotion Cards: Online Regional 2024, Participant)

If the power of a Character with an original power of 6000 or less becomes 7000 or more due to an effect, can it be K.O.'d by this [Main] effect?

No, it cannot. This effect can only K.O. a Character with a current power of 6000 or less.