Idetification?

[Warren]

Post four on vehicles are all 4 inch smoke dischargers.
This was the final resting place for a great number Canadian Ross rifles.
As to the original pictures, the first one appears to fit onto something so I would venture a guess as a smoke discharger same as with No.3 with No.2 possibly being a Mills bomb or VB launcher.
Or, a wookie blaster from Star Wars....