Cannons and Mortars Hern Iron WorksThe Mountain Howitzer was a light smooth bore cannon designed to shoot a heavy projectile with a light powder charge contained in a sub caliber chamber at the bottom of the bore Because of its light weight it was much handier than other cannons of similar caliber Add to cart Add to cart Mountain Howitzer Full Scale 2 1/4″ Bore $ 1 0 out of 5 The Mountain Howitzer was