The policy, which the company wants Congress to impose on the country, is driven by emotion, P.R., and symbolism, not logic.
http://reason.com/blog/2018/02/28/dicks-sporting-goods-drops-assault-style
Today Dick's Sporting Goods announced that it will no longer sell "assault-style rifles, also referred to as modern sporting rifles," in its Field & Stream hunting and outdoor recreation stores. The company had already stopped carrying such guns in its flagship chain of stores, following the Sandy Hook massacre in 2012. Dick's CEO Edward Stack said the company was expanding the policy in response to the February 14 attack in which a 19-year-old gunman used a Smith & Wesson M&P 15 rifle to kill 17 people at a high school in Parkland, Florida.