Franklin Armory Aura XTD Barrel Muzzle Brake 1/2in-28 Black. These new compensators are designed to greatly reduce felt recoil allowing faster follow up shots the perfect pairing for our BFSIII triggers. The Aura is perfect for minimalist and/or competition builds. Being short and light while providing excellent recoil reduction the Aura compensators are the perfect addition to any firearm. The Aura series is currently available in 5.56 1/2x28 thread with many more calibers and thread patterns coming very soon. Specifications for Franklin Armory Aura XTD Barrel Muzzle Brakes: Manufacturer: Franklin Armory Color: Black Finish: Salt Bath Nitride Fabric/Material: 416 Stainless Steel Features of Franklin Armory Aura XTD Barrel Muzzle Brakes Greatly reduces felt recoil and muzzle rise Available in 1/2in-28 for 5.56 NATO Machined from 416 Stainless Steel Salt Bath Nitrided Package Contents: Franklin Armory Aura XTD Barrel Muzzle Brakes Franklin Armory 00-52317-BLK: Aura XTD Barrel Muzzle Brake 1/2in-28 Black