Flatlines are not a good idea at all for tourney play, and for a handful of reasons. One glaring reason is that they are not adept for shooting thin shelled paint, which many tourney players and I consider to be almost a necessity for serious tournament play. They are horrible to clean, which is unacceptable. They slow paint down at longer ranges, making it even less prone to break, so for back playing they are totally out of the question, and obviously too long for any front player. So all in all, the answer is no, they are not at all suitable for tournament play.