The Proto One-Piece Barrel is obviously nice because of the manufacturer. Proto makes excellent products.
I found the barrel to be quite quiet. I currently use a Stiffi, which is much quieter, but the Proto still packs a punch.
This barrel is very accurate. It shoots straight, depending on one factor. The kind of paint you use. With a Proto Barrel, you must use a paintball such as an Xball. I shot the barrel with PMI Menaces, and the barrel just wouldn't stop chopping. I highly suggest using a really high quality paint.
This barrel will chop for about the first 500-1000 balls. After this, you will have a nice, quiet, accurate barrel.
Overall, this is an excellent barrel for $50.00. It is tough to find a barrel with such precision as this for its price.
actually, the barrel will not chop at all if you use the right paint. the website says that the bore size is .690, and if you have that size of paint then you are perfectly fine. plus, the barrel is made from aluminum, which is the same as the dye ultra light, so accuracy between a proto and a ultralight should be about the same.