Schematic Portable Bronze Mortar
Patent us3782240 M29a1 81mm medium mortar M19 mortar
M29A1 81mm Medium Mortar
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Patent US3782240 - Firing mechanism for mortars - Google Patents

m19 mortar

Mm Mortar - Improvised Weaponry - Bev Fitchett's Guns Magazine

81mm Mortar Ammunition And Fuzes