Not Engineer, but the ejector does move up and down. The ejector is held in place by two pins the ejector pin and sear pin, but only the sear pin is held in place by the frame twice so this is the firm area. The ejector pin is pushed through the frame then the ejector its there mainly to hold the sear spring arm down, since it only goes through the frame only once it is not a s secure as the sear pin. Hence you get the movement up and down and some side to side. Dont pull at it but it should not give you any problems, oh this is what also helps your ejector from breaking, some of the tolerances of the mags are a little loose so the ejector can move some what, several hundredths of an inch will work wonders.