For those of us with slighter or skinnier builds, the Female Reach armor might even fit better.
Now, if you use the Female Reach armor, a lot of people will assume you are a girl, but that's no reason not to do it. Just something to keep in mind.
For the 405th's optional Deployment Process, gender, age, race, whatever, does not matter or factor into the evaluation of your costume, if you want to pursue it. All we care about it how good you look in the armor.