A federal judge imposed a 25-year prison sentence on a Mexican national who admitted trying to purchase a Stinger missile and other armaments for Mexico's powerful Sinaloa drug cartel, the office of the U.S. attorney for Arizona said.

David Diaz Sosa, 27, was sentenced by U.S. District Judge James A. Teilborg after the defendant pleaded guilty in April 2011 on four counts of conspiracy to acquire and export high-caliber arms for the use of organized crime.

The Mexican citizen also pleaded guilty to the possession and attempted sale of methamphetamines.

In his sentence, the judge said that if this "evil enterprise" had been carried out successfully, it would have put highly dangerous weapons in the hands of "bloodthirsty, ruthless and savage gang members."

"With the confiscation of a significant quantity of methamphetamine and U.S. currency, this operation not only delivered a financial blow to a Mexican drug trafficking organization, but it also prevented further cartel violence by keeping dangerous weapons out of their hands," U.S. Attorney John S. Leonardo said in a statement.

In late 2009, Diaz Sosa began negotiating the purchase of high-powered arms for the Sinaloa cartel with people who turned out to be undercover federal agents.

Among the weapons found were three boxes of hand grenades, a Dragon Fire anti-tank weapon, a Law Rocket anti-tank weapon, two AT-4 recoilless anti-tank guns and a shoulder-mounted Stinger surface-to-air-missile.

In February 2010, Diaz Sosa and his accomplice, identified as Emilia Palomino Robles, were arrested.

Palomino Robles was sentenced in March to 10 years in prison and 5 years probation. EFE