the medium-frame colt lightning magazine rifle was manufactured between  and  it was the first slide-action rifle offered by colt colt records indicate  were produced in - - and - as a companion arm to the colt single action army revolver two versions were offered a rifle with a  in  cm barrel and -round magazine and a carbine with a  in  cm barrel and -round magazine the san francisco police department acquired  rifles all had  in  cm round - barrels and bore sfp  through sfp  stampings on the lower tang