Burlington — A 38-year-old Perkinsville man faces up to 8 years in prison after admitting to a string of armed robberies in Springfield, Vt.

Michael Bickford pleaded guilty on Monday in U.S. District Court in Burlington to robbery and carrying and using a firearm in connection with the Dec. 5, 2016, robbery of the River Street Pharmacy, according to a Friday news release from the U.S. Attorney’s Office.

As part of the change of plea proceeding, he also admitted to robbing the Windsor County South Credit Union in Springfield on Oct. 18, 2016, and a branch of Mascoma Savings Bank in Springfield on Nov. 10 of that year, the news release said.

Prosecutors said he entered the pharmacy with a pistol and wearing a dark-colored mask, pointed the gun at two employees and demanded prescription drugs. He was arrested later that day, and police found him with a loaded gun and the stolen drugs, the news release said.

Authorities said he robbed the credit union of about $3,325 while armed with a gun, and obtained about $12,000 in the bank robbery, in which he also used a handgun.

Although the robbery charge carries a maximum sentence of 20 years, and the using a firearm charge a maximum of life in prison, Bickford’s plea deal calls for his sentence to be capped at 8 years, the news release said. Bickford has been in federal custody since May.