Sorry I didn't see this when it was first posted.
Just a couple of things straight up, your chest plate is not covering the ab plate, there should be no gap there, looks like your ab may be able to come a little more.
Also biceps should sit just under the shoulder bell, one is and the other is not (both are not on the rear photo) moving the biceps up with allow more room at the elbow, also bring the forearms up a little, you are touching your hand plates.
Tops of boots sticking out under shins. At the back of the boots you also have black lines, shouldn't be there, may need to paint this white. Also the shoulder straps on the rear are sitting upwards, may need a bend down, one appears not to be reaching the back plate.
You have a very large gap on the side, you may want to even this out or try tighter strapping. Drop boxes should align with the end of the plastic belt section, adding a little glue to the straps can keep them in place, you could reduce the length of the straps also, only need a few mm's
Stunt version have a higher brow trim than Hero's but should be ok for basic approval. You could also add some white to the mic tip ridges. There should be no grey on the gums around the frown, look like you may have a little paint there.
A few tweaks and you should be good to go.
Great work and good luck with approval