SWANSBORO, N.C. -- A North Carolina salesman at a DICK'S Sporting Goods store said he quitting his job over the store's new "liberal policies" on gun sales. WGHP reports, Griffin Mccullar posted his resignation letter to Facebook on Thursday saying:The 20-year-old felt he could no longer work for or support a company where he could not buy guns himself.On Wednesday, DICK'S Sporting Goods, the nation's largest sporting goods retailer, announced it will stop selling assault-style weapons like the one used in the Parkland, Florida, high school shooting, in which 17 people were killed.The company said it will also raise the minimum age for all gun sales to 21.DICK'S will not sell high-capacity magazines that allow shooters to fire far more rounds than traditional weapons without reloading, as well as other accessories used with weapons similar to the AR-15.So far, Mccullar's post has more than 81,800 shares.