Actually, the Walmarts in my neck of the woods do sell military style black rifles (what Chucky calls an assault weapon). Until recently, they had offerings from Colt, DPMS, Windam Weaponry, Bushmaster and Sig in stock.
You want to know why an assault weapons ban won’t pass? Just look at that fact: they sell them at Walmart. These are not exotic weapons any longer. They are completely mainstream.
A boot up the backside is an “assault” weapon but I don’t see WM cutting back on boot sales.
Trust me he KNOWS. He just doesn't care. Moreover, he puts all firearms in the same category. Semi auto rifles are just the start. Before he's done all side by side and over-under shotguns will have exactly the same description and the same eventual fate.