Maybe a weapon that would project a bola sling forward, towards target, at a high enough speed and with the correct projection so that it would wrap around the target in a manner that would tie up the target. Shooter could be powered by CO2 or elastic band that is easy to load. Maybe similar to a cross-bow that has a pull arm on it where it can make stretching the band easier and faster to setup between loading new bola sling.
Mot too sure on how the shooter would be constructed. If you have a good drawing please let me know.