The Longshot uses the Clip System, or Streamline, Darts and they are now standard Nerf ammunition and come with many Nerf add-ons including the Bandolier Kit and the Ammo Box. You'll find then...
I get mine at wal-mart or target. They have nearly every kind.
Look really hard! Maybe under the couch . Good luck.
Whistle darts
maybe 6 but they will probably charge u more 4 a extra clip