Correct, uses 'pepper balls' there was a re-run of the episode when they picked them up/tried them a few days ago. Must have been an early one as it had one of dog's 'other' sons who no longer works with them. He was the 'test' subject, had body armour and a mask on, they kept shouting at him to cover his balls....It was a Tippman A5 with a load of 'upgrades' and yes indeed using some kind of pepper spraw/mace balls...