G'day All, The Nursing Sister is Lt. Colleen Mealy and the pic was taken in country and I'm sure I read somewhere that they were armed or had armed escorts, when out in the field, and yes they were taught how to handle weapons.
Back on topic the jerry cans are plastic for water, the bracket is steel and it's shape is nothing like the pic from JohnE (sorry mate), it's triangular on the sides and flat across the back, and yes the door will hold the weight cheers Dennis
PS just 4 interest sake it is a pain in the a**e shutting the lhs door with that can there if you have a litter down.