Guntec USA AR-15 Centurion Flash Hider .223 Cal Black. The device is made out of stainless steel and has a 1/2 x 28 thread. We have drilled and tapped the device for easy installation and easy take off. The device has multiple porting holes designed to reduce muzzle flip significantly. It has aggressive door breaching spikes that are designed to be hammered into the muzzle brake aggressively. The aggressive design is matched with our solid door breaching spikes which ensures that any additional muzzle devices will not be able to reach their full potential. The device has been designed to function from the first shot until the last round is fired. As a final touch the device is backed with a "Do Not Remove" symbol. We will not be held responsible for any damage caused by using this product. Specifications for Guntec USA AR-15 Centurion Flash Hider: Manufacturer: Guntec USA Caliber: .223 Remington Fabric/Material: Stainless Steel Threads per Inch: 1/2x28 Gun Model: AR-15 Length: 1.5 in Diameter: 0.8 in Features of Guntec USA AR-15 Centurion Flash Hider: Recoil Reducing Compensator 1/2 x 28 Thread Multi Porting Holes Aggressive Door Breacher Spikes Steel Package Contents: Guntec USA AR-15 Centurion Flash Hider What firearm models does the manufacturer say Guntec USA AR-15 Centurion Flash Hider is compatible with? The manufacturer suggests that Guntec USA AR-15 Centurion Flash Hider is compatible with AR-15GUNTEC USA CENT-223: AR-15 Centurion Flash Hider