機器
a1
aiming
ammunition
armed
army
assault
automatic
background
black
bullet
closeup
collection
crime
fire
firearms
forces
gun
hunting
isolated
large
lens
m16
m4
m4a1
marines
metal
military
modern
nobody
optical
police
rifle
scope
shot
shotgun
sight
silhouette
sniper
special
steel
swat
target
telescopic
trigger
violence
war
weapon
white