The AK-47, for example, is widely available to private citizens around the U.S. as a semi-automatic version (firing one shot each time the trigger is pulled), but the military grade fully automatic (continuous fire while the trigger is depressed) model is illegal almost everywhere.
While the Kindle Fire has been a huge hit for Amazon in terms of sales, it has also depressed its profit margins significantly as Amazon takes a hit on each Kindle Fire sold.
Private equity firms are showing heightened interest in manufacturers of ambulances, fire trucks and other municipal or specialty vehicles this year, as the space is still depressed enough, post-recession, to allow the firms to strike attractive deals.