Hot Russian Spy Does Maxim......?

Five months ago, hot Russian spy Anna Chapman was trying to expose critical U.S. secrets ... now, she's exposing critical parts of her anatomy.

Chapman -- who was booted out of the U.S. back in July -- stripped down to some black lingerie, threw on some diamond earrings and grabbed a pistol ... to pose for the cover of this month's Russian edition of Maxim Magazine.