Kristen Stewart Got a Sling In Her Ass

1228_kristen_stewart_x17Doing her best Dennis the Menace impression, Kristen Stewart hopped out of a truck in L.A. armed and not-so-dangerous ... with a slingshot in her back pocket.

We don't know what the 22-year-old was taking aim at yesterday, but as long as it's not married directors ... everything should be fine.

Not to be overshadowed by the slingshot ... Kristen's legs also made an appearance. Nice.