I'm a believer in ultradyne. - Ultradyne Apollo S Compensator

This was the first comp I have ever used, and I'm impressed. I used it on my standard 16" barrel AR. Yesterday I took it to the range and it makes shooting so pleasant. There is practically no muzzle lift. You can stay on target and fire rounds and you will feel like a pro. The muzzle blast is definitely something you don't want to stand directly next to, especially when you cycle steel through it. It is loud, but not enough that you need double ear pro. It's so easy to attach to the barrel and it looks great too. I am seriously impressed.