I don't know for sure about firearms, although I seriously doubt it if for no other reason than the Gun manufacturers aren't selling a million "widgets" a day to make it economically viable for a "Wal-mart" version. Having said that, some makes (Winchester for sure) do make a rifle/scope package exclusively for marketing in Wally-World. I bought a used Model 70 synthetic package, and called Winchester for some information and that is what I was told BY the Winchester Rep., that particular gun/scope was a promotion exclusively for Walmart.
There are some tires, like the French ones that start with an "M", that Walmart sells that are NOT the same quality as you might buy at Sears or a Auto Dealership. When I needed a new set of skins for my diesel truck, Sams/Walmart quoted me the same size, make, and model for $300 less than Sears. I did some digging, and found they WERE NOT the same load rating, although I would have never known that if I hadn't checked. And yes, I told them the tires were for a diesel and I needed them for heavy towing. It wouldn't have been a good thing to blow a tire from overloading it while going up or down the mountain passes in October and November when we were relocating!!!! You get what you pay for, usually.
There are some tires, like the French ones that start with an "M", that Walmart sells that are NOT the same quality as you might buy at Sears or a Auto Dealership. When I needed a new set of skins for my diesel truck, Sams/Walmart quoted me the same size, make, and model for $300 less than Sears. I did some digging, and found they WERE NOT the same load rating, although I would have never known that if I hadn't checked. And yes, I told them the tires were for a diesel and I needed them for heavy towing. It wouldn't have been a good thing to blow a tire from overloading it while going up or down the mountain passes in October and November when we were relocating!!!! You get what you pay for, usually.