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1.
A type of clip, which holds 10 rounds. The full name of the mag is Taurus PT247 Blue 40 Caliber.
Example from Jadakiss's song Something Else-

You know i like to style on ya, Blue 40-caliber, butterfly doors on the triple black challenger
by Japanirish21 June 21, 2009

Words related to Blue 40-caliber

40 blue cal caliber forty gat gun mag