The Precision Armament AFAB Hybrid Muzzle Brake is the predecessor of the now discontinued AFAB-Mini, packing a bigger punch with useful features. These Muzzle Brakes & Compensators crafted by Precision Armament act as both a flash hider and compensator - effectively suppressing side concussion and muzzle flash. Through patented AFAB technology, the Precision Armament AFAB Muzzle Brake Attachment slowly diffuse and cool combustion gases to keep you on target during rapid fire scenarios. Plus, the closed bottom design significantly reduces dust kick-up when shooting from a prone position. This device is precision machined from heat treated stainless steel and coated to withstand blazing hot temperatures, making it incredibly reliable in the field. Enhance your firearm with the Precision Armament AFAB Steel Muzzle Brake and feel the boost of confidence that comes with landing more accurate shots with significantly reduced muzzle flash. This device is not recommended on barrels that are shorter than 14.5in. For the best performance out of this muzzle brake, you'll want to use the Accu-Washer Muzzle Alignment System which is sold separately. Please do NOT use crush washers with this attachment. Specifications for Precision Armament AFAB Hybrid Muzzle Brake: Manufacturer: Precision Armament Color: Matte Black Caliber: 5.56x45mm NATO, .223 Remington Threads per Inch: 1/2x28 Length: 2.225 in Weight: 3 oz Diameter: 0.865 in Country of Origin: USA Features of Precision Armament AFAB Hybrid Muzzle Brake: Patented AFAB technology employs a complex matrix of tiny passageways that slowly diffuse and cool combustion gases so you can stay on target during rapid fire engagements while effectively suppressing muzzle flash and side concussion Closed bottom design reduces dust signature when shooting prone Precision machined from heat treated stainless steel with an advanced Ionbond high temperature CrCN coating for extreme durability Features .09375in pilot hole for permanent pinning to bring 14.5in barrels to legal length Package Contents: Precision Armament AFAB Hybrid Muzzle Brake