[patrol]

Low and ready is the term. Holding the muzzle to the sky is good for Hollywood movies but has no tactical advantages unless you are clearing a second level while going up a flight of stairs. "Grazing" fire which means firing two to four feet from ground level is easier to accomplish even though it will be at an angle if standing versus prone the muzzle down aimed in the direction of your threat still exist when in the low ready versus the hollywood to the sky method.