No, not the one from TF2.
I suggested something like this a while ago. It's a small, black pistol with an ivory grip. It has damage multipliers based on front/back shots and how far the bullet travels. If you shoot someone 64 bricks away in the front, it would be about a 7-shot kill. If you get up close and personal, (ie: point blank and right up against their back) it would be a 1 shot kill.