Bullet shot (4)
I believe the answer is:
slug
This clue is a double definition.
'bullet' is the first definition.
(I know that bullet can be written as slug)
'shot' is the second definition.
(I've seen this before)
(Other definitions for slug that I've seen before include "Kind of snail without a shell - or a bullet" , "Slimy pest" , "Garden pest - pellet" , "Bullet - punch" , "Heavy blow for snail lacking shell" .)