Roland Post-apocalyptic Gunslinger

Roland's Family is killed by a roving, hostile gang of outlaws and Roland the only survivor is out for revenge but must travel to find his quarry one by one if need be. He lives in a future Earth timeline wherein a cataclysm wiped out most of humanity and technology settling those left back generations. Centuries after the event what is left of humanity reaches the age of the old west a second time, where six-shooters and riffles are the pentacle of technology, although Roland my see old rusted structures and objects from an age gone by.