Complex sentence: Moon's breakout performance in Angel (1987) where she actively participated in some intense action scenes was significant for pioneering the Girls with Guns sub-genre and establishing her status as a bona fide action heroine.
Split into simpler sentences: Moon's breakout performance came in Angel (1987) where she actively participated in some intense action scenes. The role pioneered the Girls with Guns sub-genre and established her status as a bona fide action heroine.