STAMFORD — A city man charged for allegedly allowing a juvenile girl to help him sell narcotics to an undercover officer on two occasions is facing additional charges after a search of his Springdale home turned up six grams of crack cocaine and a loaded handgun, police said. Bismal Almanzar, 19, of Hope Street, was charged with two counts of risk of injury to a minor, possession of a gun without a permit, three counts of sales of narcotics, possession of narcotics and possession of narcotics with intent to sell.