Joseph Barbarito holds a sign as he waits for protesters to deliver a petition to Walmart in Danbury, Connecticut January 15, 2013. The petition was signed by about 300,000 citizens nationwide urging Walmart, the nation's largest gun retailer, to halt sales of assault weapons and munitions nationwide. Walmart stopped selling assault-style weapons in 2015. REUTERS/ Michelle McLoughlin 
 
 Now that Dick's Sporting Goods has banned the sale of assault-style weapons in its Field & Stream stores, many people are looking to Walmart, the nation's largest gun seller, to follow suit. 
 
 People are begging Walmart on its social-media accounts to stop selling the guns like the one used in the Parkland, Florida school shooting that killed 17 students and staff members earlier this month. 
 
 "Walmart — PLEASE match the pledge made by Dick's Sporting goods for the sake of our children," one Facebook user wrote Wednesday morning. 
 
 What they don't know is that Walmart stopped selling assault-style guns three years ago, long before the move by Dick's. 
 
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 At the time, Walmart attributed its decision to sluggish demand for the guns, rather than politics. 
 
 "It was done purely based on customer demand," Kory Lundberg, a Walmart spokesman, told The New York Times. The rifles, he said, were not "something customers were looking for and buying when they came into our stores." 
 
 Walmart still sells rifles. The 2015 decision only affected firearms that accept high-capacity magazines, or in other words, that can hold several rounds of ammunition. 

 Walmart is set to raise the minimum age for gun purchases and ammunition, according to a statement from the company. 
 
 The nation’s largest retailer announced Wednesday it will hike the minimum age for firearms purchases to 21 years old. 
 
 “We take seriously our obligation to be a responsible seller of firearms and go beyond Federal law by requiring customers to pass a background check before purchasing any firearm,” the company said in the statement. “The law would allow the sale of a firearm if no response to a background check request has been received within three business days, but our policy prohibits the sale until an approval is given.” 
 
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 Walmart also announced it would remove items from its website “resembling assault-style rifles, including nonlethal airsoft guns and toys.” 
 
 “Our heritage as a company has always been in serving sportsmen and hunters, and we will continue to do so in a responsible way,” the company said. 
 
 The move comes after Dick’s Sporting Goods announced it would stop selling assault-style rifles and stop gun sales to those under the age of 21. 
 
 During an interview on ABC's "Good Morning America," Dick's CEO Ed Stack said he was "disturbed and saddened" by the shooting at Marjory Stoneman Douglas High School in Parkland, Fla. 
 
 "Based on what's happened, and looking at those kids and those parents, it moved us all unimaginably and to think about the loss and the grief that those kids and those parents had, we said, we need to do something," he added. 
 
 Stack said the store would not reverse its decision and called on Congress to take action on gun control “with the intent of really finding a solution to this problem.” 
 
 The move by the two retailers comes amid heightened calls for gun control in the weeks following the deadly Florida school shooting that left 17 people dead and 14 people injured. 
 
 President Trump Donald John TrumpWhat to know about Trump's Supreme Court pick so far Bookstore owner calls police after customer confronted Steve Bannon McConnell pushing Trump toward 2 potential Supreme Court picks: report MORE on Wednesday urged Congress to consider increasing the minimum age for buying rifles, from 18 to 21. 
 
 "This is not a popular thing to say in terms of the NRA, but I'm going to have to say it. ... I think it's something you have to think about," Trump told a bipartisan group of lawmakers during a White House meeting. 
 
 The suspected shooter, 19-year-old Nikolas Cruz, allegedly used an AR-15 rifle during the shooting at Marjory Stoneman Douglas High School. Federal law enforcement officials have said the gun was purchased legally. 
 
 The National Rifle Association (NRA) has opposed increasing the minimum age for gun purchases, and some Republican lawmakers have also opposed the idea. 
 
 In a meeting with Trump this weekend, the NRA reportedly pressed Trump not to raise the legal age for purchasing guns. 
 
 Updated at 6:56 p.m.
– After Dick's Sporting Goods announced it would stop selling assault-style rifles and raised the age to purchase firearms to 21, gun-control advocates took to social media to ask Walmart—the biggest gun-seller in the US—to make similar changes, Business Insider reports. It apparently worked. According to the Hill, Walmart announced late Wednesday it's raising the age to buy guns and ammunition to 21. Walmart states it's making the change "in light of recent events," CNBC reports. "We take seriously our obligation to be a responsible seller of firearms," the company states. It states it will implement the new age restriction "as quickly as possible." Walmart stopped selling assault-style rifles in 2015 due to what it stated was a lack of demand. On Wednesday the company stated it would be removing any items "resembling assault-style rifles, including nonlethal airsoft guns and toys," from its website. Walmart states it also doesn't sell high-capacity magazines or bump stocks. “Our heritage as a company has always been in serving sportsmen and hunters, and we will continue to do so in a responsible way,” the company stated.