There’s a feature where you can examine a window with closed blinds to “peek” through the window, we could do something similar for firing a gun through a small porthole or blind.
I’m imagining a hunting blind as being like the tent if you’ve interacted with that, just a 3x3 building with a single space in the middle and a door, and one or more firing ports. You hunker down in that and wait for a target to get close enough to take a shot. Heck, works for hunting zombie too to some extent.
Taking an action to hide in a bush seems reasonable too, and should be fairly simple to implement.