機器
aero
airsoft
ammo
ammunition
army
asg
barrel
black
bullet
bullets
caliber
carabine
carbine
danger
gun
gunsight
isolated
m15
m15a2
m16
m4
machine gun
metal
military
muzzle
pistol
protection
rifle
security
shoot
shooting
shot
sight
soft
soldier
sport
terrorism
tube
us
viewfinder
violence
war
weapon
white