Armaspec Harmonics Tuner Muzzle Brake Features The Armaspec Harmonics Tuner Muzzle Brake fuses two functions into one compact muzzle device chambered for .223/5.56. As a muzzle brake it redirects propellant gas to significantly reduce recoil which keeps the sight picture steadier and allows for quicker more accurate follow-up shots. As a harmonics tuner it lets the shooter fine-tune the barrel s vibration pattern through a simple hex screw adjustment with no special tools required beyond a hex key. This dual functionality means the same device that tames recoil also gives the shooter a way to optimize accuracy for a particular barrel ammunition load or set of environmental conditions. Threaded 1/2x28 to fit standard .223/5.56 barrels the Armaspec brake installs easily on any AR-15 pattern rifle using that thread pitch. Finished in black it blends cleanly with most factory and aftermarket barrel finishes without drawing unwanted attention. The hex screw tuning adjustment allows for easy customization as conditions change whether that means a different ammunition lot a new barrel or a shift in temperature affecting harmonics. For AR-15 owners who want the recoil control of a brake alongside the tunability normally reserved for separate aftermarket tuners this combination device delivers both in one easy-to-install package. Armaspec Harmonics Tuner Muzzle Brake Specifications Manufacturer: Armaspec Model: Harmonics Tuner Muzzle Brake Caliber: .223/5.56 Color: Black Thread Pitch: 1/2x28 Outer Diameter: 7/8 Function: Muzzle Brake and Barrel Tuner Adjustment: Hex Screw Available At: GrabAGun