As in any first person shooter, you can expect a great array of weapons to be at your disposal, and Halo 3 is no exception to that rule. Most of the weapons found in the first two Halo games will be back in Halo 3 in essentially the same form as before, but with small power changes and cosmetic differences.
Halo 3 will show us a new weapons class, called "support weapons". These weapons are excessively large, two handed weapons. When using these weapons, the view changes from that of a first person shooter into a third person view.