draw a bead on somebody/something

minaret

Senior Member
Persian
"draw a bead on somebody/something"

Hi
I know what the meaning of this phrase is, but don't know where it came from.
What does "bead" mean here?

Thanks.
 
  • morior_invictus

    Senior Member
    Slovak
    bead (freedictionary.com)
    2.
    A small, round object, especially:
    c.
    A small metal knob on the muzzle of a firearm, such as a rifle, used for sighting.
     
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