Reviewer:
Franco Hernandez
from Lancaster, CA United States
Does what it says, look online for tips to tune it and you won't be dissapointed with the results that this barrel can give you.
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3 of 4 people found the following review helpful:
Worth every penny
March 2, 2010
Reviewer:
Anonymous Person
from SD United States
the flatline works like a dream. very accurate! I've found out if your fps is too high the flatline won't be very accurate. I had my gun about 310 fps and paintballs would be flying everywhere, after i turn down the fps to about 280 then it works like it should Playing woodsball the flatline gives you a huge advantage. Be able to shoot about 100 ft farther than a stock barrel.
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5 of 11 people found the following review helpful:
Low performance
June 25, 2009
Reviewer:
Anonymous Person
from ND United States
This barrel does what it says and gives "back-spin" which will make your shot go farther,but that does you no good when you have no idea where your shot is going. Ive put several thousand shots through this barrel and i can tell you not to waste your money. Youll be better off using the stock barrel which comes with your marker.
Good barrel 
Worth every penny 
Low performance