UK mistletoe grows at almost eye-level on smallish apple trees. The stuff you can't quite reach can be cut using a ladder. But you don't cut the whole thing, you leave some to re-grow. You can start a mistletoe by wedging a seed (from the white berry) into the gnarled bark of any tree. Guns would damage the tree (and the mistletoe!) By the way, the juice is dodgy stuff. If it got in your eyes when you shoot at it, it could burn. You do seem to adore guns over there in the USA!