1970 US Army Field Manual 4.2 Inch Mortar, M30 – MSU Surplus Store
Armorama :: M30 - 107mm 4.2 Mortar by David Althaus
Rubicon Models - A sneak preview of what to expect... The M30 106.7mm "Four-deuce" heavy mortar is an American rifled, muzzle-loading, high-angle-of-fire weapon used for long-range indirect fire support to infantry units.
Ukraine
M30, 4.2 Inch Mortar in firing pit. - MODELING - U.S. Militaria Forum
2373c M106 Portuguese Army 1.2 by TuliusHostilius on DeviantArt
BAUMIT MORTAR DE ZIDARIE BCA M30/40KG - Gospodarul Istet