I stopped in at my local gun shop and chewed the fat for an hour or so with the owner. According to him, a Walmart gun is not identical to a gun purchased some where else. He gave me a couple of examples, one being a winchester 94. He says the wood is much different on a Walmart gun. He also told me to look at a Winchester model 70. His has a removable box magazine and he tell's me walmart doesn't.
I know years ago, when everything in a circular saw was a "skil saw", Walmart went to skil and asked them to build 10,000 low end skil saws that would sell for less than $30. Skil did, and Walmart sold truck loads of them. Skil's reputations suffered as the cheaper saw's just didn't hold up, and Skil was bought out by foreign competition several years back, but the brand name is not near as popular now as it was, and my have been dropped. People who work at Skil blame the Walmart deal and labeled it the beginning of the end for the Skil brand.
I personally haven't looked that close, but I do believe the possibility exist that a model 94 bought at walmart may very well be slightly different than non Walmart 94's. Same with other goods.
I will be looking closely from now on.