What exactly do I have here? Sig p228 with build in laser

[izzy]

I found a receipt at the bottom of the box just now from when he had an SRT installed. The trigger actually sucks compared to the SRT on a newer P229 that I have. The receipt is dated 1993 so I'm guessing they've improved the SRT since then. Have to assume this thing was made before 1993.

I found an older post on armslist where someone is selling one of these for $3900. I know armslist can't be taken at face value. Is this guy for real? The pistol in the image on the posting has a second lense that mine doesn't seem to have, guessing mine doesn't have the IR.

http://www.armslist.com/posts/594853...c-ir-vis-light