I posted a review of this Muzzle Brake in the Firearms Review Forum.
(It was approved by the moderators)

This is a buddy of mine Dave Fulcomer, he's building these Muzzle Brakes on a Bridgeport and selling them Cheap.

http://www.patriotpredatorcontrol.com

He builds them per each custom order. Easy to communicate with.
Steel or Aluminum and I think Stainless but not sure.
Builds them for anything but mostly .223 and .308

They start at $27 and go up from there. I've fired two of them and put the review in the Firearms Review Forum.