Custom Tranqualizer rifle

These rifles are loaded with box magazines and are semi-automatic.

Story
Owen Grady and several Jurassic World Park Rangers used these rifles including Claire Dearing to tranqualize attacking Pterosaur that were attacking Main Street which escaped from the Aviary during the Isla Nublar Incident (2015)

Behind the scenes
Jurassic World Property Master Guillaume Delouche stated in the Jurassic Props featurette that these rifles were made specifically for the film as there is no such thing as a semi-automatic multi-dart tranquilizer. He also stated that the rifle's automatic bolt action was powered by a nitrogen canister mounted in the stock