US Busts Arizona Gun Ring, Seizes 100 Military Weapons

After two years of careful investigation, a US task force has taken down an Arizona weapons trafficking ring that sent military-grade firearms across the border into Mexico.

The Homeland Security Task Force seized 100 weapons and 125,000 rounds of ammunition while securing indictments against 28 people. The operation represents a major step forward in US-Mexico cooperation on border security.

Phoenix resident Fernando Daniel Castro, 24, allegedly ran the sophisticated operation. Prosecutors say he and others bought guns legally, then sold them at a profit to people who smuggled them into Mexico, where cartels often use American weapons to commit crimes.

The scheme violated multiple laws, including making false statements when purchasing firearms from licensed dealers. Castro and his network created what authorities describe as a multi-level operation designed to move weapons across the border undetected.

"Every single illegal firearm and round taken off the street today represents potential lives saved," said Jason Stevens, the special agent in charge for Homeland Security Investigations in Arizona. His words highlight the human cost of weapons trafficking.

The investigation built on earlier successes. Emmanual Rabena-Velderrain pleaded guilty after border agents caught him trying to cross into Mexico with 42 AK-style rifles and matching magazines in February 2025. In April 2026, a judge sentenced Amairany Guadalupe Armendariz Álvarez to 24 months in prison for picking up three M249 rifles and a Colt pistol to transport across the border.

The Ripple Effect

This bust signals a turning point in US-Mexico relations on gun trafficking. Mexico has long asked America to do more about the estimated 135,000 firearms that flowed south in 2022 alone, often ending up in the hands of criminal organizations.

US Ambassador to Mexico Ronald Johnson celebrated the takedown and promised continued action. "Working alongside Mexican authorities, we are holding arms traffickers accountable and making our two nations safer," he wrote on social media, adding, "We haven't finished yet."

The partnership between US and Mexican law enforcement shows how neighbors can tackle shared challenges together, making both countries safer one operation at a time.