The flatline barrel for the A-5, in addition to looking like a silenced MP-5, really does work as advertised. I regularly take people out that believe themselves out of range, because they know that I am out of range of their guns. While the flatline is quite loud (its not ported), the very loudness can freak people out - espcially when you have an RT and are shooting bursts or full auto at them.

The only two items to worry about are paintball size -- you get better performance from slightly bigger balls, which can be a problem if you're in a "field paint only" situation and get stuck with lousy balls -- although they still work, you lose some accuracy at greater ranges. The second is cleaning the barrel. Between the cyclone system and not being able to easily take off the barrel, using a squeegie on this barrel can be a chore. Just make sure you are beind a tree and out of range when you're trying to do it. 5 stars

The Flatline barrel lives up to it's claim of increasing range, no other barrel system can come close to matching the distance. However, the flatline does have some quirks. First, high quality, small diameter paint must be used for the barrel to work best, as a gap between the paintball and the barrel is needed to create the backspin. The barrel must be cleaned often for best performance, as the gelatin from the paintball will build up in the barrel which decreases the amount of backspin, thus decreasing range. The barrel accuracy is also affected by things such as high wind, moisture in the air, and the angle the barrel is held. If the marker is tip sideways at an angle, the paintball will hook, so with practice you can actually get your balls to hook around bunkers at a certain range, which really surprises your opponents. It makes a great addition to your A-5. 4 stars

Not only does it look nice, but it REALLY DOES IMPROVE THE RANGE. And drastically, too. I have NEVER had to arc my shots, and contrary to what some people say, the Flatline has NEVER chopped a ball for me. I highly recommend this item. 5 stars

The Flatline is the best thing a Tippmann owner can have. It is good for woodsball and back and mid players in sup' air. It can make the marker weigh more but with an e-grip or e-bolt this gun is amazing. This is great for games when you need to reach out and touch someone. This thing is loud but that just scaries newbies. Get this for your a-5 or 98 custom right now, for around $120. 5 stars

If your into Scenario games, get this barrel. Increased range, and , most importantly, accuracy get bolted on in about 5 minutes. It only takes a couple shots to get used to the rise of the ball from the curved barrel, and once you got that, 9 out of 10 times your target is painted. Just remember that this isn't a speed ball barrel (or gun) because it is a big cannon looking barrel. It's completely worth the price. 5 stars