Paint picky !!!
Breake balls easily
Very Hard to clean
Internal scratchs easily
This gun will give you all that Tippmann advertised if you:
1) Use good, "expensive", and big size balls
2) Use highly consistent and "expensive" tank and regulator, to comply with Tippmann own recommendation speed, 270-280 FPS.
If you are a new player who want to have a better accuracy and a descent range, try to get other inexpensive barrels such as J&J 14" ceramic or 14" Empire twister barrel. If you concern more about money, get Tippmann sniper barrel. It is cheaper than J&J or Empire by about $10.
Another downside of this barrel is that it is hard to clean. If you break a paint in this barrel during a combat, you won't be able to clean it fast. If you can't clean it, the next ball come out of this barrel wil no longer have a descent accuracy; since this barrel relies heavily on its "engineered surface and shape" of its internal.
This barrel is a pain in the @$$. Save $50 and get a better accuracy with other barrels. Stock barrel somewhat is more accurate that this Flatline barrel