Instruction: Evaluate the answerability of a question by analyzing the related document, outputting yes if the document contains information addressing the question, and no otherwise.

Input:
Question: is the barrel rifled/bored or not? (the spiral grooves inside to increase round stability)
Document: According to physics, all barrels over 16&#34; make more harm than use. Balls start to loose speed in them and when they eventually crack inside it is a hell of a job to clean that long barrel with standard swabs.
This is a really nice barrel, nicely machined, made of top notch materials.The only reason it's missing a star is because it was advertised as a tippmann a5 barrel, but comes with the wrong threading and no adapter.Still, with the correct adapter gets the job done with a nice increase of accuracy.
I purchased this barrel through Dorosports and within a few days it came in with no problem having to attach it to my A-5. It looks insanely good on the gun and is a seriously intimidating thing to see when your playing woodsball. Have never had any problems with the ball breaking inside and the range and accuracy is also great. Definitely worth the money for this barrel.
So personally it seems to me the barrel length doesn't affect these guns as much as I thought it would.
This barrel is a good buy for someone wanting to improve accuracy with little cost. Looks good on the marker too.
We bought it for my eldest son who plays paint ball with his brothers and some friends, he was really happy with how this barrel performs when they play.
It all depends on how you play. Range and accuracy were great for me, but I also use a red dot scope which put balls fired from this barrel on target. I don't sprint full speed so the length wasn't an issue. It's got a large bore size and I believe in underboring. So like I said, it all depends on how you play. I can't imagine this thing in close quarters.
I got this barrel for an A-5 and when it arrived I put it on and took it out for a test drive right away and it worked, the gun was shooting strait but when I switched back to my 13 in. barrel I didn't see much of a difference. Then I thought to myself &#34; lets see how bad this thing shoots with no barrel&#34; so I took the barrel off and shot it and it seemed to shoot just as strait...
Answer: no