Trump’s proposal came as Walmart said Wednesday it will raise the minimum age to buy guns and ammunition at its stores to 21. The retailer also said it would remove items resembling assault-style rifles—like airsoft BB guns—from its online store. The move came as Dick’s Sporting Goods said it would stop selling all assault-style rifles at its Field & Stream stores and would similarly raise the minimum age of gun sales to 21. CEO Edward Stack said he expects backlash over the move, but added, “We don’t want to be a part of this story any longer.”