The retailer is further requesting that customers refrain from openly carrying firearms at its Walmart and Sam’s Club stores unless they are law enforcement officers. However, it said that it won’t be changing its policy for customers who have permits for concealed carry. Walmart says it will be adding signage in stores to inform customers of those changes. The retailer has long found itself in an awkward spot with its customers and gun enthusiasts. Many of its stores are located in rural areas where hunters depend on Walmart to get their equipment. Walmart is trying to walk a fine line by trying to embrace its hunting heritage while being a more responsible retailer. The Bentonville, Arkansas-based discounter said Tuesday it will stop selling handgun ammunition as well as short-barrel rifle ammunition, such as the .223 caliber and 5.56 caliber used in military style weapons, after it runs out of its current inventory. The announcement comes just days after a mass shooting claimed seven lives in Odessa, Texas, and follows back-to-back shootings last month, one of them at a Walmart store. Walmart and Kroger joins a string of other retailers and restaurants including Starbucks, Target and Wendy’s in asking customers not to openly carry their guns when they visit their premises. But they are not enforcing an outright ban because they don’t want to put their employees in confrontational situations. The nation’s largest retailer has been facing increasing pressure to change its gun policies by gun control activists, employees and politicians after the El Paso shooting and a second unrelated shooting in Dayton, Ohio, that killed nine people . A few days before that, two Walmart workers were killed by another worker at a store in Southaven, Mississippi. “Walmart deserves enormous credit for joining the strong and growing majority of Americans who know that we have too many guns in our country and they are too easy to get,” said Igor Volsky, executive director and founder of Guns Down America, in a statement. “That work doesn’t end with Walmart’s decision today. As Congress comes back to consider gun violence, Walmart should make it clear that it stands with Americans who are demanding real change.” Walmart’s moves will reduce its market share of ammunition from around 20% to a range of about 6% to 9%, according to Tuesday’s memo. About half of its more than 4,750 U.S. stores sell firearms, or around 2% of all U.S. firearms. Most firearms sales are done through thousands of unaffiliated gun shops or gun shows, not big retail chains. Walmart says it hopes to help other retailers by sharing its best practices in background checks. And the company, which in 2015 stopped selling assault rifles like the AR-rifles used in several mass shootings, urged more debate on the reauthorization of the assault weapons ban while also calling for the government to strengthen background checks. Walmart said it sent letters Tuesday to the White House and the congressional leadership that call for action on these “common sense” measures. Last month, a gunman entered a Walmart store in El Paso, Texas, killing 22 people . The gunman used an AK-style rifle — one that Walmart already bans the sale of — in the deadliest shooting in the company’s history. Texas became an open carry state in 2016, allowing people to openly carry firearms in public. But supporters of stricter gun laws say Walmart’s latest steps should have an outsized influence because of its clout, sending a strong message to Congress as well as other corporations. A number of gun control activists praised Walmart’s moves, while gun manufacturers such as Vista Outdoors and Smith & Wesson parent company American Outdoor Brands Corp. saw their shares fall. The National Rifle Association posted a tweet attacking Walmart’s announcement.