Breek Arms Plan B Echo Single Port Muzzle Brake .30 Carbine 5/8x24 Nitride Black. The Breek Arms Plan B Echo Single-Port Muzzle Brake significantly reduces recoil and muzzle rise through 90 degrees horizontal blast-vectoring ports keeping your rifle flat fast and ready for seamless suppressor swaps. Specifications for Breek Arms Plan B Echo Single Port Muzzle Brake: Manufacturer: Breek Arms Color: Black Finish: Nitride Fabric/Material: 4140 Steel Outer Diameter: 1 in Length: 1.75 in Features of Breek Arms Plan B Echo Single Port Muzzle Brake The Plan B Echo is a Single-Port Muzzle Brake with an ultra-compact design featuring a single oversized lateral port which vectors gas 90 degrees left and right for slashing felt recoil muzzle-rise reduction competition-grade stability minimal blowback. Package Contents: Breek Arms Plan B Echo Single Port Muzzle Brake Peel Washer Breek Arms BRK4431: Plan B Echo Single Port Muzzle Brake .30 Carbine 5/8x24 Nitride Black