I was at the Den doing some small jobs for Becky. One of them *beep* kids took my *beep* .44 Revolver, which also happened to be my only *beep* gun. *beep*
They also took the car part. You know the one you find in kalmath? Yeah, they took it and god only knows if i'll be able to get it back. Maybe its in New Reno or something. That's another thing. I did find my revolver at a shop in the Den. But I can't steal it back. Its baffling.
http://www.youtube.com/watch?v=HQGnq3kqWrI
You have a couple of options to get them back actually. In my latest playthrough, I just had gotten done with Klamath and decided to go into the shop at The Den. The kid took my Vault 13 water can and because it was a holy relic, I decided to pull out my gun and shoot the brat in the eye. This killed him and made all of the street children hostile towards me. I ended up shooting each of them to death. After I had done that, Sulik informed me that he does not like childkillers, so I killed him as well.
The other option is to just steal them back.
Well, i'm at Vault City now and completing the quest between it and Gekko. I also managed to steal a couple of firearms on my way there through Modoc. Still can't find the car part though.
http://www.youtube.com/watch?v=HQGnq3kqWrI