Ah BEagle now you are showing your age....no CS pellets anymore and they can light as many of the GSR testing pellets they like since they are just inert disco smoke to test the seals, all done on a laptop. H&S is so all-encompassing now, that the "poor Regt cpl" has to have his own GSR on the whole time the respirators are tested lest he decide to sue HM for developing lung cancer when he's 78....