Holding the reins of two horses with one hand, Austin Police Sgt. Adam Johnson raised his service pistol and fired a bullseye into the target some 312 feet away.

Down went Larry McQuilliams, and so ended his rampage through the streets of the Texas capital, where he’d fired more than 100 rounds from his AK-47 and .22-caliber rifles at buildings. The shot, from Johnson’s Smith & Wesson M&P .40 pistol, hit McQuilliams square in the chest and made the 15-year-veteran the toast of gun enthusiasts around the country.

“At a minimum, it was extraordinary shot,” said Army Maj. John Plaster, a retired Special Forces operator, long-range shooting expert and author of “The Ultimate Sniper: An Advanced Training Manual for Military and Police Snipers.”