However, the video clip (of unknown provenance) doesn’t seem to match the one described in the text of the message, nor does it provide visual proof that the object shown is actually firing bullets.
[snip]
Do “cell phone guns” represent an alarming turn in concealed weaponry technology? Probably not, as a customs spokesman maintained that "there’s no indication that these are being mass-produced."
There a difference between custom-made hardware only available to drug cartels, and mail-order. No cop could reasonably expect a random kid on the street has one of the former.