Re photo 1 again......... He won't be going out on patrol like that without going to the ammo compound first - to pick the ammo and his webbing up! Like Tankie says about the grenades. Pictures like that are the ones the AFPU's send home to your mum and dad to show them that beloved son is safe and well and looking warry! A quick tweak of the striker lever could shear the split pin and in your earliest military training lessons you were taught what to do and what NEVER do with grenades. Carrying them properly was day one, lesson one!
And who told him to stand the carrying handle up like that, not even locked into the AA position.
The interesting thing is his 'JERKIN, leather, sleeveless, MT drivers'. These were very warm and popular and used well into the 70's