I know it was more of a thing with the Antebellum-era Texas Rangers and the Mexican-American War, but the Colt Paterson would be a cool addition. Perhaps, officers and NCOs of the Texas Brigade could randomly spawn with them since at least a few of them would have been former members of the Rangers. Some may have even served with John Coffee Hays at Bandera Pass where the revolver saw its combat debut.

https://en.wikipedia.org/wiki/Colt_Paterson

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