The Pulse Rifle was Jaco's weapon of choice. Upon arriving to Earth, he immediately used it to fire at a S.H.I.E.L.D. Quinjet from which Melinda May ordered him to stand down. The shot was powerful enough to seriously damage the Quinjet, causing it to crash.
Jaco also wielded the rifle when Sarge's Squad stormed Deke Shaw's company's office. He fired at Shaw and Alphonso Mackenzie who had come to his rescue, but he missed them and instead seriously damaged the wall.
Jaco was given his rifle upon being released by Sarge from the Zephyr One's Containment Module where he was detained. He used it against Agent Diaz, who was wounded in the shoulder by the attack. However, he lost the weapon to Yo-Yo Rodriguez who used her superhuman speed to remove it from his hands before he could react.
The Pulse Rifle emitted concussive orange energy blasts powerful enough to throw their target several meters away while inflicting physical injuries in the process.