When I was down in Mesa with my mom (she was taking me to antique stores) and I said 'Hey, the SWAT team is in front of that building!' So she looked at a few stores and took me over to talk to them. They had their weapons on a table, with the Simunitions. Screwloose is right, they do have to change the barrels. They all agreed that they hurt about twice as bad as a paintball gun. So I wouldnt want to play against them with Simunitions! There was also a show on the History Channel called 'Conquest' which usually features primitave fighting techniques, knight-era fighting, and so on and so forth. But in 1 episode they went against a SWAT team, who were playing as the terrorists with a hostage. At first I thought they were using airsoft, but they were using Simunitions, which I guess are gaining popularity! Does anyone know of any SWAT teams that train with airsoft?