Blade Runner is a 1982 American cyberpunk science fiction film,
directed by Ridley Scott.
The screenplay, written by Hampton Fancher and David Peoples,was based on the novel
Do Androids Dream of Electric Sheep? by Philip K. Dick.
The film stars
Harrison Ford 
and features
Rutger Hauer 
Sean Young 
Edward James Olmos 
M. Emmet Walsh 
Daryl Hannah 
The film depicts a dystopian Los Angeles in November 2019 in which genetically manufactured beings called replicants
visually indistinguishable from adult humans – are used for dangerous and degrading work in Earth’s “off-world colonies”. Following a small replicant uprising, replicants become illegal on Earth; and specialist police called “blade runners” are trained to hunt down and “retire” (kill) escaped replicants on Earth.
The plot focuses on a brutal and cunning group of replicants hiding in Los Angeles and a semi-retired blade runner, Rick Deckard (Ford), who reluctantly agrees to take on one more assignment.
Ridley Scott credits the Painting Nighthawks and the Graphic Novel the long tomorrow
as the inspiration for the movies look.
Comic Books have played some importance on the blade runner film
Seven versions of the film have been created, for various markets, and as a result of controversial changes made by film executives. A rushed Director’s Cut was released in 1992 after a strong response to workprint screenings. This, in conjunction with its popularity as a video rental, made it one of the first films to see a DVD release, resulting in a basic disc with mediocre video and audio quality. In late 2007 Warner Bros. released in theater and DVD, HD-DVD, Blu-Ray the 25th anniversary long-awaited digitally remastered definitive Final Cut by Scott.
Also just because its so cool, here are some images of blade runners gun
Plager Katsumate Series-D blaster or the m2019 whatever you wanna call it.
So if you have never seen Blade Runner get the final cut dvd and if you have go and buy the 5 disk version