Gun; search (5)
I believe the answer is:
rifle
I believe this is a double definition.
'gun' is the first definition.
(I know that rifle is a type of firearm)
'search' is the second definition.
(I know that rifle is a more specific form of the action search)
(Other definitions for rifle that I've seen before include "strip bare?" , "Ransack - firearm" , "Standard military gun fired from shoulder" , "Security provider with stock" , "Winchester" .)