Perhaps some clarification is appropriate. The series features many components that you usually find in science fiction (maybe also in fantasy, but I've no clue about that).
The setting is typically a dystopia, sometimes even sub-societies that resemble full-fledged dictatorship.
A small crew, against all odds, and with almost super-human intellect (Hannibal/Face) and ingenuity (Murdoc/B.A.) manages to free the oppressed and helpless people using some improvised technology (can it get more science fiction there?).
Last but not least, they manage to fine-tune their attacks so to not (seriously) hurt anybody, but they're not using phasers (on a stun setting) but MGs (without basic aiming skills).