I used Draxxus Midnight or whatever... But most will work fine
Sound reduction, Some what accurate.
None I can think of.
When I first got this barrel it was at the same time I got my gun so I didn't feel any difference. My friends kept telling me how quiet the barrel was and that they wanted it. Last year I did a science fair project on barrel accuracy. I used this barrel and the stock barrel. The stock bareel was all over the target while the Werks was in a condensed area. So thats it for the accuracy.
If you want a nice barrel without tpayin alot for a 2 piece. This one is nice