Multiple Levels for varied accuracy and distance
Quieter than the Flatline
None so far to my knowledge.
I recently bought an APEX barrel to replace my flatline. I wasn't sure if it was a great move because I loved my flatline. It'd gotten me through many games and I was never upset with it. However, once I tried out my new APEX, I was sold. This barrel is awesome! I play mostly woodsball and was hoping for a little more accuracy because with the flatline, many times the shots would curve off and hit trees. The APEX so far is much, much, MUCH more accurate than the flatline. I was able to shoot in between trees, avoid areas of brush, and all around be able to hit people better.
Another awesome feature of the APEX, was the distance I got out of it. When I put the barrel on the 8th level (the level for the greatest amount of distance), it shot much farther than the flatline and more accurately. I figured that the stages I would be using would be 4-5. Those are the stages with good accuracy yet still shoots a good distance. But since I saw how far and how accurate level 8 shot, I'm thinkin' of changing my mind.
As I suggested above, the APEX has different "levels" in which you can shoot. 1 being the shortest and most accurate level and 8 being the farthest and "least accurate" (although it was hardly inaccurate). This helps out greatly when playing because you don't get in those situations you got in with the flatline when someone was kind of far away so you knew you had the distance to get them, but you were worried about how many shots it'd take you to hit them. With the APEX, you can say "Hey, that guys a bit farther away, I'll just switch it to level 6 and get them". So when you're up close and personal with people you can switch the APEX down to say Level 3 or 4 to easily hit them accurately but when the time comes and you see someone too far away, you can jump up to Level 6-7 and nail them.
Looks. I like it. The pictures above don't give the barrel justice. I thought it was going to look funky having a big block at the end of my gun. That's true, yes, but it doesn't look weird. It just looks like your gun has a silencer, and its pretty cool. As opposed to my flatline which looks somewhat like a muffler yet doesn't quiet your shoots any, the APEX looks much sleeker and is definately quieter than the flatline.
If you want to upgrade from your flatline, or are looking into buying something with distance, accuracy, looks, and is quiet, I'd definately suggest to you the APEX Barrel.