Voadam
Legend
Form an armed posse of a group to go out and fix a situation.Are they? I don't know of many D&D adventures that involve thwarting a cattle baron who is driving innocent homesteaders off their land because he wants to secure water rights for his herd. I've heard the argument that D&D is very American, and sure, that's fine, but Old West? What themes does D&D share with Old West literature or movies?
Keep on the Borderlands, and points of light in general are very frontier oriented.
Everybody has weapons.
Conan is a lot of western stories with a fantasy veneer, Beyond the Black River in particular. Conan is a big model for some of D&D, particularly original model freebooting violent adventurers recovering loot.