Nate Dogg Sex Tape Being Shopped

2/20/2012 5:00 AM PST

Nate Dogg -- Sex Tape Being Shopped

A 5-minute sex tape featuring the late Nate Dogg and an unidentified female lover has surfaced ... and it's being shopped to various media outlets ... TMZ has learned.

We've seen the tape -- shot several years ago -- and it's pretty much what you'd expect ... a lot of sex ... two different positions ... and a sexy Luther Vandross soundtrack.

Sources tell us ... the person in possession of the tape is currently shopping it around to the usual porn studios. So far, no takers.