4.2" M2 Mortar

4.2-Inch M2 Chemical Mortar History and Equipment

Learn about the U.S. 4.2-inch, or 107mm, M2 chemical mortar. This rifled, muzzle-loaded heavy mortar served with Chemical Warfare Service units during World War II. Although developed for chemical-warfare roles, M2 crews used high-explosive, smoke, and white-phosphorus ammunition to provide heavy indirect-fire support.

This category is intended for live-fire M2 mortar systems, components, ammunition, and support equipment. The products currently displayed are shared mortar-training accessories rather than confirmed M2-specific parts or ammunition. Review each listing for stated caliber compatibility, included components, condition, and applicable transfer requirements.