My team leader carried an M16A2 with a M203 mounted and an M9 on the hip, the squad leader carried an M16A2 and an M9 and then their was me the gunner, or should I say pack mule hauling an M249 (SAW, squad automatic weapon) 600 rounds spare ammo (that was strickly my choice, I prefer to have more than not enough) an M9 on the hip and old reliable a mosberg 500A 12 ga with extended mag strapped to my back. Oh yeah I also got the joy of being the one mounted on the MK19 while on patrol. We personaly did not start seeing the M4 style rifles until we were about done with our tour.
I did see alot of other units have them, I even got to see a seal sniper team with a .50 sniper rifle. Ya they are some lucky guys they get the best equipment out there. I guess when you are the baddest mothers in the game you make the rules ha ha.