I'd consider it a 'genre'... ripe for an exploitation-cycle. -Though restricted to landgrabbing and robbery scenarios. -With its own unique gun, popular in the ol' outback; the duckfoot-pistol.... with 4, 5, 6 barrels splayed like a duck's foot, in the calibers of .36, .45. and .52.
I just saw Captain Fury a few days ago... an Irish rogue, banished to Australia to work on a greedy land-baron's sheep-farm. He escapes, gathers a cult-following, then raids the countryside in Robin Hood-style.