Just got this barrel for my KWA M16BR 2GX and I must say, it was worth the money. For those of you who, like me, are worried about installing it and possibly messing up the installation, don't be. It's very simple, just watch the video about it and Tim lays it out perfectly. As far as performance, I haven't used it in an Op yet but I took it out in my yard and noticed a significant increase in accuracy and shot consistancy, an increase in my hop-up's effectiveness (though that may not be the barrel, it may be that I took it apart and lubed the hop-up), a noticeable range increase, and a slight FPS boost.
Your shots seem to stick together more and you don't get as many stray shots that whizz off in random directions. Using only iron sights on my M16 the bbs were hitting right on the money every time at 100 feet (I couldn't test any more range than that cause it was raining and I shot from my garage lol) and I'm sure with this barrel I'll be able to engage human sized targets at 200 feet easily. If you have an M16 and you want to do a simple, relatively cheap mod that will produce great results, I'd highly reccomend picking up one of these barrels.
Increase in accuracy
Increase in consistancy
Increase in range
Increase in FPS
No cons that I have encountered!
Rating: [5 of 5 Stars!]