Corrected entry: Towards the final battle, we can see the avatars using fire weapons that would belong to humans, since avatars wouldn't have the technology. The weapon would look so tiny being used by an avatar, if it respected the proportion of a human being, but it fits the avatar frame perfectly.
ione
24th Dec 2009
Correction: When Jake first goes out into the jungle, he's armed with a large-scale gun (probably designed for the mechanical suits). This is the gun used in the final battle.
JC Fernandez