The big Gander Mountain location in the upscale suburbs where I live claims to be the largest gun shop in the state.
I ordered a few products from them by printed catalog in the 1990s but never online or in the retail store.
There's a huge Bass Pro Shop near me too. They always had a lot of stuff I'd buy but I remember handgun rounds being low or out of stock(.45acp 9mm .40S&W etc). This was around 2009.