Ultra-compact single-port design for the Plan B mounting system. The Breek Arms Plan B Echo Single-Port Muzzle Brake significantly reduces recoil and muzzle rise through 90 horizontal blast-vectoring ports keeping your rifle flat, fast, and ready for seamless suppressor swaps. Brand: Breek Category: Brakes & Compensators Series: Plan B Model: Echo Single Port Caliber: 223 Cal / 5.56mm Color: Black Material: Steel Size: Ultra Compact Finish: Nitride Length: 1.75" Includes: Peel Washer Thread Pattern: 1/2"x28 Weight: 2.30 oz