This muzzle brake has been having shooters say “WOW” for many years. This compact muzzle brake was specifically designed to be stylish yet with only 2 chambers keeping it short and stout, it performs with the best of them.. This Toxic AR-15 Muzzle Brake has two chambers that significantly reduces muzzle rise. It has 1/2×28 threads, so you can attach it to your favorite 5.56 or .223 barrel and finally finish that build you have been working on. It is made from high-quality steel and features a durable phosphate finish that will look great on any AR build.