Needs fleshed out, obviously, but they're off to a good start.
Thanks for the compliment! I started the site and have really been working to flesh it out, thankfully a few other guys have really started to contribute to the site and we're growing nicely.
I invite everyone to check out the page on The Professional and see if they can identify some of the unknown guns.
How can you have Firefly without VERA?!
For the record, for the OP, Vera is a heavily decorated Saiga 12 originally made for the Eddie Murphy movie "Showtime".
And Mal's gun is a custom bronze frame over a Taurus Model 85 .38 special.
Oh, wait, I can edit it. Lemme do that...
Edit: Okay, I added a bunch of stuff.
Dobson had an Astra 9mm in the pilot, he shot Kaylee with it.
Zoe's Mare's Leg was built off a Rossi 92 44-40, and was originally made for the series "The Adventures of Brisco County Junior"
Simon had a rubber stunt casting of a Vektor CP-1 in the pilot, in the standoff with Dobson