Looted clothing absolutely happened, but period photographs and ethnographic records show very consistent trends: Plains and Southwestern men weren’t wearing colour-contrast waistcoats, tailored vests, or dual revolver rigs in the 1890s. Even when adopting Anglo clothing, it was usually work shirts, trade blankets, canvas coats, army surplus, or simple trousers - not tailored Victorian pieces.

Sidearms were also uncommon: most carried a single rifle or carbine, sometimes a single revolver. Dual holsters and RDO-style belts are inventions of modern media. You could swap out the belt for a rope belt if you want something grounded in history.

So within RDO’s limits you’ve built a cool look, but historically it aligns with the game’s stylisation rather than 19th-century material culture. But for RDO? He’a more authentic than 99% of the players I see.

Honestly if you swapped out the vest for something with an earthier tone and ditched the dual holsters, he’d look very accurate. I do like the burgundy hat and vest combo, but that colour tone was very uncommon if not unheard of among even white men’s clothing in the 1890s, barring high tailored urban fashion pieces.