Cops say this gal was a real stunner.

A Chinese national was busted trying to sneak a stun gun through a security checkpoint at Kennedy Airport, the Transportation Security Administration said yesterday.

Sihui Xie, 21, was trying to board a flight to Orlando Friday when a TSA screener spotted the pen-sized stun gun tucked in her carry-on bag.

At first the item appeared to be a flashlight, but a closer look revealed it to be a stun gun/flashlight hybrid.

Port Authority cops arrested the woman and charged her with possession of a weapon in the fourth degree.