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1.
Ammunition capable of piercing armor.

Armor piercing rounds.

Vest Poppers was introduced in Mobb Deep's "One of Ours"
"All of them are filled to the top of the vest poppers, we can get it on with america's best coppers."
It doesn't matter what type of armor you wearing, if you get hit with the vest popper its over.
by warng October 28, 2011