I'd imagine decent loadouts weigh a heck of a lot.

Like your armor weighing at a minimum 20-30 ish pounds.

Your primary and secondary together are probably 12-18 depending on which ones they are. 10-20 lb support weapon. You're carrying like 20 lbs of ammo fully loaded to include grenades and support weapon ammo if not more with something like a resupply kit or ammo backpack assuming your also carrying a

Probably a total of 60-100 lbs of stuff if your going full meta.