firing pit

firing pit crew

concealed pit

open burning and open detonation (OBOD) (= open-pit)

pit (logistics)

pit

pit detail

pit forces

pit-type emplacement

tank pit

recoil pit

antitank pit

crank pit

underground storage pit

lubrication pit

weapon pit

obstacle pit

test pit

target pit

ammunition pit

concealed pit tank trap

concealed-pit tank trap

pit tank trap

punji pit

shallow weapon pit

spiked pit

machine-gun pit

firing point / firing pin

firing position / firing attitude

firing limit / firing cycles limit

dual-firing circuit

electric firing circuit

enclosed firing rod