not really quiet, but who cares?
cluster gets wide at high fps
This is a really good barrel for not much money. that's what everyone wants isn't it? I got mine two weeks ago and have used it three times. I have gotten more kills than ever and it is intimadating. It's really accurate for the price - I paid $22 for mine on ebay brand new. Also, it's MUCH quieter than the stock barrel! This is a great buy. The only drawback is the spread at high fps, but it's not that bad.
BUY IT IF YOU WANT A PRETTY GOOD BARREL FOR NOT TOO MUCH $!! I only gave it a nine because it isn't perfect ( nothing is )