1. A FIELD GUN POSITIONING DEVICE INCLUDING IN COMBINATION A GUN BARREL ELEVATOR INCLUDING: A TRIPOD, A THREADED VERTICAL SHAFT, A HAND-WHEEL INCLUDING AN INTERNALLY THREADED PASSAGE THERETHROUGH FOR ELEVATING SAID SHAFT THROUGH SAID TRIPOD, A BALL-NUT SECURED TO THE UPPER END OF SAID SHAFT, A CLAMP FOR GRIPPING SAID BALL-NUT ADAPTED TO FROM A NON-RIGID COUPLING THEREWITH, MEANS FOR SECURING SAID CLAMP TO SAID GUN BARREL; AND A BUTT POSITIONER INCLUDING A LINEARLY EXTENSIBLE BUTT REST, AND MEANS FOR SECURING SAID BUTT REST TO THE BUTT OF SAID GUN AT A PREDETERMINED ANGLE.