Paintball
This puts spin on the balls allowing for a straighter shot which makes this tippmann A 5 one of the most accurate markers I have used. I shot this kid from about 50 yards away in the woods and he never knew where it came from. It was awesome! The flatline barrel increases the range of this gun to an impressive distance. (I bet I could have hit him from even further than that with this this barrel. It also made it easier for the landowners to allow paintball players on use their land knowing the paint was no longer long lasting. With the new guns or markers and the ease of cleaning the paint.