My brother's A-5 Flatline barrel is accurate, easy to clean, the balls break once in a while.

And if you don't think this is all true than it is operator's fault. 

u need good paint and pratice and this barrel is amazing

the flatline is easy to clean just get a straight squegee fold the rubber circle down and put it down the barrel once it hits the bottom of the barrel the rubber circle resets and then you just have to pull it out, so i am going to say how expensive it is is it's weakness

It breaks easily after dropped off a really tall building.

i think if u get any thing get a freak barel there the best

andyhughes wrote: I'd take the lapco bigshot over those choices. Whenever I use my Flatline on my A-5 r/t, the balls pretty much go around the target while with another barrel like a Dye UL, the balls go in a consistant rope so I'm not sure whether its kick or general lack of quality that makes it unaccurate but I'd recommend you steer clear of it altogether.

At higher rates of fire it tends to do that. I don't know why but some people think the airflow in the barrel gets messed up when you shoot fast and that decreases accuracy. I've had the same thing happen to me so I know exactly what you're talking about but when I noticed it I experimented. I tried shooting slow and then shooting fast while watching my accuracy. When you shoot slowly your shots fly very accurately but when you up the ROF they go all over the place, seemingly everywhere but where you want them to. If you play a lot of speedball or your just very trigger happy then get a bigshot instead but if you can control yourself then you should be fine with a flatline. You get a ton of range and the trajectory is extremely flat, my jaw dropped when I first used it. For best results with it you obviously want the best paint but you it's not like you won't be able to hit a thing if you don't use marbs or other RPS paint. I had very good results with team colors at west point and that stuff isn't expensive at all. The barrel is expensive but you have a huge advantage over the enemy because of the range it gives you.

i HAVE a flatline, and obviously use it, the lil problem with the flatline is, that when u shoot, your barrel has to be perfectly vertical if u want to hit ur target, if ur gun is tilted to the side just an inch u will see the ball swerve in that direction, missing ur target and thats why some of u think the barrel is in-accurate, when u get a perfectly level shot its right on target, but with the way i play i dont stop and think of having the gun vertical, i shoot out the sides of things, like everyone else, so i dont like the way it does that, but the range is incredible, if u have the time to line ur gun up and take a shot u cant beat it, thats why i bought a teardrop, i feel more comfortable with a straight barrel, so even if i lean to the side, its a straight shot, but the flatline is a very good barrel and i wont sell it or throw it away, i prefer it for long range woodsball..

Commander Cool wrote: once the ball reaches about 100 feet it is very vulnerable to wind and makes it inaccurate

Explain to me what other barrel reaches 100 feet straight out, without pretending to be field artillery???  As for the wind effects, try this correlation... The longer the ball is in the air, the more prone it is to wind effects.  Obviously, the flatline is more prone to wind since it travels a heck of a lot farther and is in the air longer.

I disagree about the rapid fire issue from another post.  Try the same test with your marker bolted to a stand.  Now test the accuracy with a low and a high ROF. 

As for your choice of barrels, I would still go with the flatline.  I use it in both speedball and woodsball.  The flat trajectory is the key for speedball.  You can actually aim without arc.

The only drawback to a flatline is the noise.  When you shoot the flatline (at least the A5 version), EVERYONE on the field will know where you are to some degree.  It's extremely loud and metallic sounding.  Of course, if you play it right, that can work to your advantage.