DALLAS—One of the three Grand Prairie men convicted in several takeover-style armed bank robberies around the Dallas-Fort Worth area was sentenced Monday to more than 300 years in federal prison, the U.S. Attorney’s Office said.

Jason Montes, 21, was ordered to pay more than $126,000 in restitution and serve 4055 months.

Authorities say Montes was one of the “Grand Prairie Bandits,” a crew responsible for nine robberies committed in 2006 in which assailants dressed in black and armed with large caliber pistols would take over the bank and threaten employees and customers. The robberies occurred in Arlington, Irving, Dallas, Grapevine and Cedar Hill and took less than one minute. Montes and Margarito Armijo, 20, were convicted in April on eight counts of conspiracy to commit bank robbery, eight counts of bank robbery and 16 counts of using a firearm during a crime of violence.

Co-defendant Luis Favila, 20, plead guilty in September 2007 to nine counts of ban robbery an two counts of using a firearm during a crime of violence. Favila was sentenced in July to 42 years in prison.

Armijo was scheduled for sentencing next week.