Tha Carter Lil Wayne
this lyric from Lil Wayne has a girl wondering how the gun will fire if it is made out of plastic in the following lyric of the song says "you see when ya boy run off" so Lil Wayne has told her the gun is made from plastic as to not worry her
She doesn't understand how his pistol (probably a Glock GmbH) can be so effective, given it's mostly plastic frame.
several pistols, including glocks, are polymer-framed. polymer meaning high strength plastic. however only the outter frame of the gun is plastic.