It varies from mission to mission, the same as it does for any special mission unit. The guys who were part of Bravo Two Zero had almost 200 pounds per man of gear, much of it water that was cached. On the other hand, teams who are watching an urban safe house who's hide is a hotel room can order room service, so all they might carry is clothes, observation and comm gear (with the later possibly being cell phones and laptops), light arms (maybe- depends on the location), sterile credit cards and cash.

If you look at US or NATO line infantry, a hundred pounds per man is easy if they are on foot, but that includes everything from the skin out. Without more details, any guesses would be sketchy at best.