600px-JPIII Barrett
A bullpup variant of the Barrett M82 .50 caliber sniper rifle known as the Barrett M82A2 is seen used in the hands of the mercenary Cooper. When first testing it at an aircraft boneyard, Nash tells him it's an "Einhorn 20mm" that fires 20mm high explosive incendiary rounds, is gas operated and uses a rotating bolt. It is fitted with an AN/PAS-13 Thermal Weapon Sight (TWS) and a Harris bipod. The rifle can be heard being fired off-screen several times during the first encounter with the Spinosaurus, but none of the rounds seem to hit their mark as the dinosaur appears unharmed.