Not picky over paint
the AK version is very quite
There really are no key weaknesses to this product
I used a Flatline on my 98 for about two years, struggling every game with broken paintballs. It didn't seem to matter if I bought the cheapest paint on the market or Marbalizer, paintballs would be broken. This often cost games. I had done my homework on the Apex, and had often considered it, but initially the price was about the same as the flatline, and there was quite a bit of controversy surrounding the barrel and its ability to curve paintballs, so I just stuck with the Flatline. One day I happened to find the AK-47 version of the Apex, 98 threads, new, for $30. Needless to say I made a purchase. Upon its arrival I put it on the gun and noticed that it was considerably longer than the standard Apex system that a buddy of mine uses. A somewhat trivial matter, but it does help suppress some of the sound by allowing the gas to dissipate prior to exiting the barrel.
Now for the meat of the review
The first time using the barrel was an excellent experience, especially after using a flatline for so long. During an average day I could count on at least 4-5 breaks and ultimately having to switch back to my 14" smooth bore. Not so with the Apex. 800 rounds, no breaks, no wingers, just smooth perfect flight. I set the adjuster to 4 clicks, about half way, and noticed that it had an effective range very comparable to the flatline's, and again, this was only half way. I never used the curve features that the Apex has, I never really had a chance, or a need to do so, although while target shooting I did play around with it. As compared to the standard Apex, the AK-47 Apex (which, if you haven't noticed is primarily what this review is about) is quite a bit quieter, which again is a trivial issue, but it is nice at times.
There are really no key weaknesses to this barrel that I have yet found. Its a little bulky, but not horribly. The only problem that this product suffers from is the ignorance of people who have never tested it , and immediately jump to the conclusion that because a product can do something that gives the player using it an advantage, therefore it should be "banned". Were that the case, paintball would have never evolved past stock class, so don't bash something that you're guilty of.
Overall, an outstanding product. It preforms flawlessly, every time, a welcome change to a flatline system. Best of all, its cheap now, while the flatline is still in excess of $100, I think I've made my point as to the economics of the situation.