Hello Dan,
Wrong pin, it should be flush on either side. It would not sit proud like that on either side. The ejector adjustment angle is critical to the proper functioning of the MP-40. That is invariably the cause of FTE (failure to eject), stove-piping, etc., when it isn't the ammunition. Ejector adjustment is accomplished by altering the angle of the curve and ejector face, not bending or flexing the roll pins. The ejector should ride up in the bolt slot for it, barely touching, if at all, but not dragging. If that is an original pin it is not for that spot on the MP. If it is not, or just a standard roll pin, mark it and cut an end off and file it down, insert, file down, insert and fit, until it is flush and swaged on the ends.
Regards,
HB