I think AM armor is too large for you, 175 lbs is very thin. you should be able to fit
into a 'screen accurate' version of armor.
look at the following makers
ATA, AP, TM, and then finally at AM.
AM armor is for people 6' + tall, and 210-240 lbs.
your size around your torso is the only element you'd want to consider, in making armor at your height.
and if you're 175 lbs then you're thin enough to wear better armor.
AM is for really large people, not just tall people.
you'd probably have to cut off INCHES of plastic all around to get it to look right.
better to get a more accurate suit to begin with, than to buy cheap and then
have to mod, and cut ton's off.
my 2 cents!