That depends .. if its a big fucking fire extinguisher you will need to have had physical training to run more than a minute of two with it and if its one those little fuckers no one will notice .. far better to carry a few dud grenades or a small package marked SEMTEX as no fucker will dare go near you.
What an absolute disgrace you @Ape typical that you would associate yourself with a fake "medic".. I expect that in real life your name is something like Gavin, Julian, Nathaniel or Heinz.
I would not be in favour of going after his non-grandchildren. Rather I would have LCS bound arms and feet coated with eucalyptus oil and fed to starving koalas.