Rousch Made In The USA Premium Tactical 4/15 A-2 Birdcage Muzzle Brake Break Plus Precision CNC Machined Black Oxide Coated Crush Washer Threaded 1/2"-28 TPI for .223 .223 wylde 5.56 .22 and Smaller Made in the USA Mil-Spec(1.75 Inches) A 2
This IS NOT your standard A2 Muzzle Brake Bird Cage These have been coated in BLACK OXIDE rather than the standard Phosphate.The Black Oxide gives these Bird Cages the true Black color only the most expensive and sought after muzzle devices possess.The A 2 Bird cage is the standard muzzle device of the US  and is found on most USGI rifles (because it's works).Made In The USA Rousch Sports Premium A2 Flash Hider  Specifications: CNC machined Heat Treated Steel Standard US Military 5 Slot Design Premium Black Oxide Finish 1/2"x28 Tpi  Application: Model 4/15 .223 5.56 .22  Length 1.75"  Will accommodate application of USGI bayonet