Offering the Control Shield and Muzzle Brake as a bundle. Order together and save.You breach, shoot a few rounds and then can't hear feedback from your team because you're temporarily deaf from the concussion and blast noise from your muzzle device. The Fortis Control Shield was designed and patented to push the noise forward for combative situations or even for simple range use, while the top ports keep the muzzle device flat on target.Muzzle Brake:Features: 4140 Steel / 303 Stainless Steel Nitride / Bead blasted For .223 / 5.56 1/2 x 28 TPI Comes with a crush washer 2.8 ounces 2.28 inches Made in America Fortis Control Shield compatibleFortis Control: Features: 4140 Steel 4.2 ounces 2.36 inches Diameter 1.49 inches Made in America