英文關鍵字
aim
ammo
ammunition
arm
armed
army
automatic
background
barrel
black
brass
bullet
caliber
cartridge
combat
crime
criminal
danger
dangerous
defense
firearm
grip
gun
hand
handgun
isolated
kill
magnum
metal
military
object
officer
pistol
police
precision
protection
revolver
safety
secure
security
shoot
shot
silver
steel
target
trigger
violence
war
weapon
white