Assertion: mortar's firing pin | /r/CapableOf | ignite the propellant
Facets:
Source sentences:
text: Larger mortars such as the breech loading M1919 12-inch Coastal defense mortar are manually fired once the shell is in the mortar, using a lanyard pull to strike the firing pin igniting the propellant or electrically with a primer that ignites the propellant when the firing switch is closed.