correct, it's a 106mm recoiless rifle used for anti-tank warfare and also had ammo that would explode over troops and shoot 999 1" darts at them. They now use it for avalance control in a lot of places.Mike, is that a 105mm? I think they use those for Avalanche control now! My Father-In-Law in the Fishing Picture above was stationed their in the Korean War! He was a Pole Linesman Instructor! Very cool!