action
aim
ambush
anti
antiterror
black
building
city
counterterrorism
counterterrorist
elite
fire
firearm
firing
force
gun
magnification
marksman
mask
military
mission
officer
operation
operator
optics
police
policeman
rifle
rifleman
roof
scope
secret
secure
security
shoot
shooter
sight
sniper
spec
special
stand
standing
swat
tactical
tactics
telescopic
terrorism
tripod
weapon