I have never used a Magma, or seen one up close, but I have purchased parts for my Star, including one casting from Magma, and they were identical. Magma has replaced the Black Hycar washer with a White Nylon one, and they have added an O-Ring to the bottom of the Die chamber to prevent leakage. Otherwise the Star and Magma/Star seem to be identical, and the parts are interchangeable.