556
556mm
activity
ammunition
ar15
army
assault
automatic rifle
background
black
brass
bullet
caliber
cartridge
closeup
concept
defense
equipment
firearm
full metal jacket
golden
gun
lead
m855
m856
metal
military
object
operation
rifle
security
shell
shooter
sight
sport
steel
table
tactical
tactical gear
tactical rifle
target
travelling
war
warfare
weapon