Brandon Ross, 22, of 383 Concord St., was arrested at 12:45 a.m. Thursday at a Rimmon Street address.
Ross and an unknown companion went to the 471 Beech St. residence of an acquaintance about 1 p.m. on Jan. 18. Police said Ross pointed a gun at the resident when he answered the door.
He is accused of holding the gun on the victim and two of his friends, while his unknown companion gathered up a Playstation 3, Xbox and an iPod, placing them all in a backpack.
They fled the apartment with the items, along with several hundred dollars in cash.