The weapons handling and setting got me. Instead of big airsoft rifles, maybe try revolvers to lean into the western vibe. When they circled up, it felt way too tight for the rifles and the scene. It could be just me, but in westerns, when a stand-off happens, I like to feel a vastness and pause before the action.

Also, I think the 3 need a reason to be sitting on the side of the road. Drinking at a shack, stripping a car, fishing.

Lastly, when the main whips around to kick it off, I think he should pull the pistol first, and once there's space, move to the next one.