The guns at Walmart are no differnt than the ones at dealers with the exception of the speacil variants made just for walmart. even then, they're the same quality as regualr run guns. The gun companies aren't going to risk the liability of a lesser quality product just to satify a single retailer. Too much at stake for them. regardless of what the LGS guys will spout off the Walmart stuff is ordered through distributors just like everyone else. they simply buy in such large quantiies that they are given a lesser cost which they in turn can pass along to the consumer. It's how large business works.
I'm still in the frame of mind that one should forget the extra few dollarsthey save at WM and be a loyal customer to thier local gun shop(s). After all, at these shops, they're a person not just a faceless number like at WM. It's these shops that'll be wiling to talk with you, help with problems and hopefully be there after Wm drops thier firearms.