Yeah we kept a few cases out after the demo shot and let the new guys function em as designed......we "tossed" em into our prior demolition shot craters around the range. All fun......suprising that there were no duds . The Mk 2 was a good tool if being stored all those decades and in two random cases we kept back didn't have a misfire. Says alot about the quality of simple designs and good workmanship and construction.
Such as the the Mk II and the RPG 7 series tools ..... solid choices for the small team tactics IMO.
Stay safe !
BTW.......I think your describing the scene where they used the mortar rounds by pulling the fuze pins smacking em on a hard surface for setback and lobbing em over the rubble mound scene aren't ya ? All they had were rounds vs the rounds and the tubes.
Not frags ....mortars as I remember the scene.