FXS Blackline (2011 & later)FLS Softail Slim (2012 & later)
Easy Brackets - Softail Slim, Slim S, Blackline,
Easy Brackets is a lockable, detachable quick release mounting systems for saddlebags with a flat, rigid backside ( as Cs4 saddlebags) . These systems allow you to take off your saddlebags in seconds.
An alternative is the lockable, adaptable Cs4 quick release system