英文關鍵字
arms
automatic
background
barrel
battlefield
black
box
bullet
commando
components
crime
danger
dead
details
equipment
firearms
gun
handgun
iron
knife
license
making
males
man
mechanical
metal
object
officer
part
pistol
precision
protect
protection
recon
recovery
repair
restoration
security
shooting
shop
shotgun
soldier
steel
submachine
tool
trigger
war
weapon
wood
work