(KVOA) -- 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."
The M4 carbine is used by the U.S. military and by Border Patrol agents. It's even used by the Border Patrol's tactical unit, BORTAC. Agent Brian Terry was carrying the M4 when he was shot and killed in December 2010.
Del Cueto tells us that because some of those M4s have not been replaced, agents are pooling their weapons, which makes it difficult to personalize the settings on a rifle, such as the sights.
"The problem is they are now pool guns so what happens is instead of having their individual ones they have sighted in they're having to use a pool weapon that you don't know who used it before you," del Cueto said.