Damien Lashaun Nelson had others purchase firearms for him illegally between June and October of last year.
The two men were also sentenced to serve one year of probation.
The incident took place in October 2019 on the Red Lake Indian Reservation.
As part of their pleas, the two also admitted to multiple other carjackings in the Twin Cities.
A judge ruled against a request for a temporary injunction on the fair's weapon's ban, keeping it in place while the lawsuit proceeds.
Robert Vaughn Evans, 53, was sentenced to 70 months in prison followed by three years of supervised release.
Dayne Adrian Sitladeen pleaded guilty in U.S. District Court Wednesday.
Because of a previous felony conviction, Phillip Jones Jr. was prohibited from purchasing or possessing a firearm or ammunition.
Marc Bell Gonzales was sentenced in U.S. District Court Wednesday.
Peter Rafael Dzibinski Debbins, 46, was sentenced to 188 months in prison.
Jennifer Lynn Boutto pleaded guilty to one count of embezzlement and theft of Tribal funds on Tuesday.
Robert Hager was the CEO of Border State Bank in Northern Minnesota.
Martha Smith admitted to child endangerment over a period of years while the child was in her care.
Benjamin Roggenbuck pleaded guilty in September.
Isaiah Goodman has been charged with one count of mail fraud.
Abdelhamid Al-Madioum pleaded guilty to one count of providing support to a designated foreign terrorist organization.
Harald Schumacher allegedly misappropriated nearly $500,000 in commissions owed to travel agents he worked with.
They were among the 60 people charged last month in a scheme that involved convincing older people to pay for expensive fraudulent magazine subscriptions.
Shimon Shaked allegedly evaded more than $800,000 worth of income tax.
Tevin Jay Maurstad of Minneapolis was sentenced to 270 months in prison on Wednesday.
Michael Morris was part of an international sex trafficking operation that coerced hundreds of Thai women to the United States.
Jeffrey Collin Purdy allegedly made threats to a former classmate dating back to 2017.
The husband-and-wife videographers are attempting to sue the state.