The Tiger Rock Inc. MZ-AR4 AR-15/.223/5.56 Custom Ported Muzzle Brake enhances shooting performance with unmatched efficiency. Precision-engineered from CNC machined tool steel, it features ten ports designed to minimize back pressure for improved accuracy. This durable muzzle brake combines heat-treated construction with a sleek black oxide finish, ensuring long-lasting performance and corrosion resistance. With standard threading of 1/2x28 and machined wrench flats, installation is simple and straightforward. CNC Machined Tool Steel .223/5.56 Nato Compatibility 10 Hole Ports for Reduced Back Pressure Heat Treated for Optimal Performance Conveniently Machined Wrench Flats Thread Pitch: 1/2x28 Keeps Subsequent Shots on Target Corrosion-Resistant Black Oxide Finish Upgrade your AR-15 setup with the MZ-AR4 Muzzle Brake for superior shooting accuracy.