Just doing a quick bit of [url=http://james-camerons-avatar.wikia.com/wiki/Na%27vi]research[/url].

Did you know that the Na'vi identify avatars because of their hands and feet?

[indent][quote=http://james-camerons-avatar.wikia.com/wiki/Na'vi#Physiology]Na'vi have four fingers on each hand including opposable thumbs and four toes on each foot including opposable big toes; unlike the human-created avatars which have five fingers on each hand including opposable thumbs and five toes on each foot with non-opposable big toes due to the influence of human DNA during avatar genetic sequencing.[/quote][/indent]
This would make things tricky for my character since any human weapons made for the avatars would be designed for differently shaped hands than she'd have, although a scene of her bashing an assault rifle's stock with a rock to try and mold it into a better shape would be fun. :lol