The only gun store in San Francisco is shuttering for good, saying it can no longer operate in the city’s political climate of increased gun control regulations and vocal opposition to its business. “It’s with tremendous sadness and regret that I have to announce we are closing our shop,” High Bridge Arms manager Steve Alcairo announced in a Facebook post on Sept. 11. “It has been a long and difficult ride, but a great pleasure to be your last San Francisco gun shop.” Alcairo said the breaking point came this summer when a local politician proposed a law that would...