DoubleStar Carlson LE Comp 5/8X24 TPI Muzzle Brake Black. Six scallops machined into the face give this comp a more aggressive look. The two ports at the top allow gas to be directed upward while the solid bottom keeps the muzzle down. Specifications for DoubleStar Carlson LE Comp 5/8X24 TPI Muzzle Brake: Manufacturer: DoubleStar Color: Black Projectile Caliber: .308 Caliber Finish: Black Nitride Threads per Inch: 5/8x24 Gun Make: AR Platform Gun Model: AR-15 Features of Doublestar Carlson LE Comp 5/8X24tpi Muzzle Brake Thread pitch: 5/8 x 24 Face - 5 machined scallops Package Contents: DoubleStar Carlson LE Comp 5/8X24 TPI Muzzle Brake What firearm models does the manufacturer say DoubleStar Carlson LE Comp 5/8X24 TPI Muzzle Brake is compatible with? The manufacturer says that DoubleStar Carlson LE Comp 5/8X24 TPI Muzzle Brake is compatible with AR-15DoubleStar CC446L: Carlson LE Comp 5/8X24 TPI Muzzle Brake Black