Heather Chancey, also known as Heather Lee Slater, was one of four previously convicted felons who were indicted in the case last July. The 34-year-old pleaded guilty in November to charges that included conspiracy to illegally deal firearms before being sentenced Monday by U.S. District Judge James Robart.
Seattle U.S. Attorney Jenny Durkan said Chancey sold the guns with no sales records and no concerns about where they would end up.
According to the indictment, Chancey sold more than three dozen firearms, including sawed-off shotguns, to an undercover agent and introduced the agent to the others involved, who agreed to sell more guns.
Two of the other defendants have also pleaded guilty, and the fourth is scheduled to face trial next week. Many of the sales took place in the parking lot of the Tulalip Resort Casino.