I had the pleasure of speaking to Monty (owner of Centurion Arms) at length when I was doing my FN CHF barrel comparison. He is a Navy Seal and is very serious about offering quality gear. Support for Centurion Arms is support for someone who has selflessly laid his life on the line for us. Understand that.
I have used and abused his barrels and rails. I have never had a problem and have recommended them to many. As a matter of fact, I recently recommended the C4 rail to the owner of the shop that I 'smith for and he is in love with the build now. The C4 rails are my top choice for an actual quad rail. They mount on a standard barrel nut, they have built-in QD sockets, do not require removal of the gas block, they are as light as a Troy Alpha in the same length, and are very easy to install. They look great as well. One of the things that I like about the C4s is that they are tumbled, so the edges of the rail are not sharp. I look forward to more product offerings from Centurion Arms. The barrels? What can I say, they are FN manufactured CHF barrels. They will take a lot of abuse and every AR I own has an FN barrel from one company or another.
Centurion Arms is absolutely one of the most underrated companies in the industry. They are First Class.
Monty, if you happen to read this, Thank you.