Nelson 75 Series Big Gun Sprinkler Available as full or partial sprinklers in a variety of paths and connections, interchangeable taper ring nozzles make flow rate adjustment a breeze. Although this sprinkler may be the smallest member of the Big Gun® family of sprinklers, it uses the same ball bearing device as the others and the rugged construction of the large sprinkler. It can also be paired with the QC100 for a portable quick-joint system.