HighCottonKennels is correct, but box launchers are also used for HRC style walk-ups, diversion birds and breaking birds that are encountered in typical HRC retrieving tests. So, in addition to wingers for most marks, at least one box launcher can be helpful. I have just finished field testing a Gunners Up box launcher and it is a very good piece of equipment, performing as well or better than others that I have. It is lightweight, making it easy to carry, but is still substantially made. It is somewhat adjustible, so you can vary the arc. It does not throw a bird/bumper/Dokken the distance that a winger will, but it is not intended for that. Nevertheless, it will make a fairly high throw, perhaps as much as 20 feet high (depending upon the weight of what you are throwing) at a reasonable distance given its size and could be used for some field marks.
