She doesn’t have superpowers, yet she’s part of one of the most powerful teams in the Marvel universe, how did she do it?
By Jim Benton.
Of course, the fact that she takes pride in showing you her butt no matter the situation also helps. A good example is the cover art of Black Widow: The Things They Say About Her #1 (2005).
I have a feeling firing a gun in that pose is horribly uncomfortable, but hey, I appreciate the fan service.