Magpul's influence is pretty big. In addition to Alfred Manufacturing, there are other plastics people that rely on Magpul, and there have been rumblings that they will either follow Magpul or close their doors as there isn't another manufacturer that will fill the vacuum by Magpul leaving.
And they are serious. The bill passes, they're leaving. Although I don't want to see any business leave Colorado, I applaud their decision and their ability to follow it thru.