Corrected entry: After the Na'vi derail the supply monorail and open the ammunition boxes, one of them says he found RPGs and Stingers. Considering this is a few centuries in the future, it is unlikely that a primitive weapon like RPG or a 1981-era MANPADS like the FIM-92 Stinger would still be found and in use.
tsahi
27th Jul 2023
Correction: Norm says, "We're taking the whole case, the mags, the RPGs, and the Stingers." It is not out of the question that in this future, rocket-propelled grenades still exist and that there is some sort of weapon called a Stinger. The weapon Norm is looking at when he refers to the case does not look like a contemporary RPG or Stinger, but something made up for the film (just like every other military weapon that is used).
BaconIsMyBFF