firearm trigger
mechanism that actuates the firing sequence of a firearm or other weapon when pushed down by a finger
en-GB/ˈfaɪəɹɑːm ˈtɹɪɡə/
en-US/ˈfaɪɚˌɑɹm ˈtɹɪɡɚ/
mechanism that actuates the firing sequence of a firearm or other weapon when pushed down by a finger