All of us have been blasting Covenant and Flood in Halo games for long enough that we've got a pretty good feel for what to do with which weapon. Nonetheless, the boys at 343 Industries are beginning to unveil the weapons we'll be using in the upcoming Halo 4 and it's hard not to be excited. I fully expect stalwarts like the assault rifle and battle rifle to be re-tuned, at least in the single player modes, just because it's a new game and something has to be different.
Beyond the BR and AR, though, this rundown of human weapons (alien weapons are still to come) you should be excited about the sticky grenade, the single shot semi-auto and the mean-looking railgun. Have a watch and then direct yourself over to Halo Waypoint for more info on each.