MA-1 may refer to: Bennett MA-1 ventilator, a powerful medical ventilator to assist respiration Fire control system used on the F-106 interceptor MA-1 bomber jacket, a nylon flight jacket MA-1 rifle, a variant of the EMERK K-3 rifle U.S. Route 1 in Massachusetts The abbreviation for Massachusetts's 1st congressional district Mercury-Atlas 1, a test flight of Project Mercury Mal'ta boy, Paleolithic human remains