a)They do actually sell guns during certain game-time hours, but we don't see the game-time shown anywhere (though there is a time shown here on the forums).
b)It's always nighttime in the game so they never sell guns (despite the name, this possibility only just occurred to me).
If b then I suppose it might be something to add to the Help page (or maybe I'm the only person to have overlooked that). If OTOH it's (a) then maybe we should see the game-time shown somewhere


I suppose there could be an option c, there is a game time but it's STILL always night-time, although that'd look a bit unusual.