Is this made for M5 only or does it work with genesis base figure?? Is a little confusing to get the info from the product page??
M5 is a shape for Genesis so it will work on all Genesis shapes.
If I'm understanding it correctly, it's designed to work with M5...to modify the shape of M5 in various ways. You can use it with other shapes (like M4 for Genesis or Basic Male) but the results will be different...the resulting faces won't look the same as the promo pictures. I would guess that they'll still look good though.