The News 4 Tucson Investigators have uncovered that some U.S. Border Patrol agents have lost a key part of their arsenal. And that has agents who patrol along the border here, extremely worried.

We learned that U.S. Customs and Border Protection’s Offices of Border Patrol and Training and Development are inspecting the quality of agents’ M4 carbines throughout Border Patrol sectors nationwide. But agents tell us, some of those M4s have not been replaced. And, we’ve learned, agents are required to share rifles amongst each other.

“There’s a lot of agents that are pretty upset over it,” said Art del Cueto, president of the Border Patrol’s Tucson Sector union. “We know it’s a dangerous job. We know what we signed on for but we want to have as much of the equipment as we need to perform the job.”