From this story in the San Francisco Chronicle:
San Francisco's only gun store can resume selling firearms as early as November after the Police Department approved a conditional permit Wednesday, first requiring the store to beef up security measures before it reopens. Sgt. William Coggan, who presided over the three-member panel that approved the retail permit, said opponents of High Bridge Arms on Mission Street near Valencia Street had failed to offer evidence backing their assertion that the store brought crime to the neighborhood. "High Bridge appears to be a reasonably well-run business," Coggan said of the shop, which opened in the late 1950s. "And even with all the restrictions and limits San Francisco puts on the store, High Bridge has the legal right to sell guns."
Steven Alcairo, manager of High Bridge Arms, said the store's owners would happily meet the department's request for increased video surveillance and waist-high barriers outside the shop to thwart any would-be thief who might try crashing a car through the front window. "It's a fair request," Alcairo said. "It's about following the letter of the law, and that's what we do." The store's owners had closed High Bridge Arms in January and hoped to convert the space to offices, but the city denied them a permit. When they sought to reopen the gun store, neighborhood groups objected.