The Davidka was a homemade Israeli mortar used in Safed and Jerusalem during 1947–1949 Palestine war. Its bombs were reported to be extremely loud, but very inaccurate and otherwise of little value be
Davidka mortar, Givati Museum, Israel
Davidka at Birya Fortress
Batei HaOsef Museum exhibit of a Davidka mortar with a cutaway shell to the left of the mannequin
Davidka memorial in Davidka Square, Jerusalem
Barrack buster is the colloquial name given to several improvised mortars, developed in the 1990s by the engineering unit of the Provisional Irish Republican Army.
Davidka
…Improvised artillery in the Syrian civil war Barrack buster - improvised mortar created by the Provisional Irish Republican Army Media related to Davidka at Wikimedia Commons…
IRA's Barrack Buster mortar