Its a gun from Perfect Dark.
Correct, and it's not just any old gun. It is THE PISTOL of Perfect Dark. Basically the equivalent of Goldeneye's PP7 with an extra round in the clip. The gun Konrad modeled looks just like a realistic version of the Falcon 2, and it's gorgeous. I'm wondering if the reason he called it a Falcon 45 might have something to do with the similarities.
You guys should seriously consider putting this into the mod. It's an incredible model, and wouldn't have trouble fitting in at all under the guise of Falcon 2. Especially considering that Perfect Dark was a sister game to Goldeneye. I would have a freaking orgasm if this made it in.