107mm / 4.2" Mortars

107mm and 4.2-Inch U.S. Heavy Mortars

Explore the U.S. 4.2-inch, or 107mm, heavy-mortar family organized into model-specific M2 and M30 categories. Both were rifled, muzzle-loaded weapons developed for heavy indirect-fire support. The M2 served with Chemical Warfare Service units during World War II, while the M30 became its Cold War successor and saw extensive service during the Vietnam War.

Use the M2 and M30 subcategories to find model-specific history and associated listings for live-fire systems, components, ammunition, and support equipment. Because configurations and compatibility vary between models, review each listing for its stated application, included components, condition, and applicable transfer requirements.