An interesting article by Adam Savage (MythBusters) on the sci-fi classic.

I’m still such a big Blade Runner fan that I watch it at least once every 18 months. I also own pretty convincing replicas of the “blade runner blaster” wielded by Harrison Ford’s world-weary former cop Rick Deckard. The source material was a Steyr Mannlicher .222 target rifle magazine cover, with a Bulldog .44 carriage underneath. I can’t get enough of this prop. Now, I want a working one.

to Popular Mechanics