This is what caught my eye in the article that sent up red flags:
"The indictment claims Blanco bought many of the illegal weapons and gave them to Reyes."
The weapons were not illegal. They may have been purchased illegaly by "straw purchases" and trafficked illegaly to Mexico, but that does not make the guns themselves illegal. Probably some airhead lefty writer at KFOR saw the word weapons and automatically assign the illegal moniker out of force of habit.
How do you know they were not illegal? Did they have too short of a barrel? Were they modified in any way that is not legal? Have you seen these weapons? Have you inspected them? I do admit that the media does like to use words to sell papers and ad time on tv. Assuming that everything about the weapons was legal is the same thing as assuming they were illegal.