Major retailers are facing backlash for selling guns. Here's how 13 chains across America sell them.

In the wake of the deadly shooting at the Marjory Stoneman Douglas High School in Parkland, Florida, Dick's Sporting Goods CEO Ed Stack announced its two chains (Dick's also owns Field & Stream) owned by the company would stop selling assault-style weapons and would require gun buyers to be at least 21 years old in all of its stores.

The company sold a gun to 19-year-old Nikolas Cruz who is accused of killing 17 people in a Florida high school, The New York Times reported, but the gun was not used.

Dick's later said it would stop selling guns in 10 stores as a pilot program and announced in March it would expand the test to more than 125 store locations.

Though Dick's CEO Edward Stack hinted that the company could remove guns from more locations, many of the chain's 720 stores across the United States sell guns.

Dick's Sporting Goods' subsidiary chain Field and Stream, which is focusing on hunting and fishing gear, sell guns with the same policies as Dick's.

It has 35 locations across the US.

Bass Pro Shops sells different types of firearms, including semi-automatic rifles. Bass Pro has 200 retail and marine center stores located across North America.

Buyers must be a resident of the state in which they purchase a firearm and must be at least 18 or 21 years of age, depending on the firearm.

Bass Pro Shops did not stop selling weapons after the shooting in Parkland in 2018, despite gun policy changes from Dick's and Walmart.

Bass Pro Shops acquired Cabela's in 2017, which has over 50 locations across North America and gun purchases are subject to the same policies as its parent company.

Camping World, a retailer focused on RV sales, also sells firearms.

According to its website, Camping World sells guns and ammunition to buyers who are over 21 years of age, though local and state laws also apply.

The retailer faced pressure this year from the business software company Salesforce to stop selling many of its weapons. Camping World did not make any immediate notable changes to its gun sales policy. It is no longer listed as a customer on Salesforce's website.

Camping World has over 120 locations across the US.

Gander Outdoors, which was acquired by Camping World and renamed from Gander Mountain in 2017, sells semi-automatic firearms and others with the same rules as Camping World.

Gander Outdoors had 162 stores in 2017, but shuttered 32 stores after filing for bankruptcy that same year. The chain was bought by Camping World Holdings shortly after which announced in 2018 that 69 new Gander Outdoors stores would open that year.

The sporting goods chain sells semi-automatic weapons and did not announce a plan to change its gun sales policies in 2018.

"We serve a broad base of customers, and outdoor sports, including hunting and shooting sports, are an important tradition and recreational activity for many of our customers and their families," senior director of communications Elise Hasbrook told The Huffington Post in the wake of the deadly shooting in Parkland, Florida in 2018.

Academy Sports and Outdoors requires all buyers to comply with state and local laws for gun purchase. They must also pass a criminal background check and can be turned away without a sale for any reason, the store's website says.

L.L. Bean's Maine flagship store is the only store of its over 39 locations that sells guns, according to CNN, but the company announced in 2018 that it would restrict its sales to those who are 21 or older.

The Maine-based retailer made this announcement following similar announcements from other retailers like Walmart and Dick's Sporting Goods at the time.

Big 5 Sporting Goods has an age minimum of 18 for gun purchases. The company sells semi-automatic weapons in addition to other firearms, according to its website.

As of November of 2018, Big 5 Sporting Goods had over 400 locations across the US.

With over 230 locations across the US, Dunham's Sports sells semi-automatic weapons to in-state residents with identification.

Dunham's Sports has no additional age restrictions on gun sales, according to the Detroit Free Press.

There are over 90 Sportsman's Warehouse locations across the US. The retailer sells a range of firearms to buyers who are 18 years or older, according to its website. Certain weapons and additions are only sold to customers who are 21 years or older.

Sportsman's Warehouse also sells semi-automatic weapons.

Scheels has 27 locations in 13 different states and sells a variety of firearms to buyers who are 18 years or older, according to its website.

Scheels requires a background check and ID verification before purchase.