Stores and online suppliers of guns are selling out all across the nation.

FOX News Radio's Jessica Rosenthal reports:

Some stores suspended gun sales, but those that didn't are selling out fast. This gun enthusiast in the Dallas area who works at a gun store but wanted to remain anonymous says he was on one website that sells guns and it crashed.

(Gun Enthusiast) "I watched 300 lower receivers be sold out in 30 minutes. You can't find AR-15's anymore. They're gone." A receiver is the primary component of a gun. While places like Dick's Sporting Goods are not selling certain semi-automatic weapons, an online search of several Walmart stores shows they're simply out of stock of many rifles.

Jessica Rosenthal, FOX News Radio.