Deckard’s hand-cannon in Blade Runner: Deckard’s gun was an amalgam of several other guns, namely the .44 Bulldog and a Styer Model SL. For the movie, they added some winky-blinky lights and a massive grip, making the thing look like it came off of a tank. And who could forget those massive CHOOMPF sounds it made when Harrison Ford fired it? This wasn’t a little popgun, it had some real kick to it. It certainly wouldn’t be very comfortable to wear in a holster under your coat, but it would give you some serious intimidation skills when you whipped it out. (via Triviagasm: All the Best Futuristic Guns for Your Holster)

— travors

This reminds me, I need to watch Bladerunner again.