Open

Source Core Rulebook pg. 634
These maneuvers work only as the first salvo on your turn. You can use an open only if you haven’t used an action with the attack or open trait yet this turn.

Feats

Deadly Aim, Impossible Flurry, Impossible Volley, Penetrating Shot, Point-Blank Shot, Spirit's Wrath, Sudden Charge, Whirlwind Strike