The Yankee Hill Machine 431536A, also known as the Mini Q.D. Flash Hider, is specifically made for YHM\'s advanced fast attach sound suppressor systems. Despite its compact size of only 2 1/8\" and lightweight construction of 3.3 ounces, it has been conscientiously designed to meet the needs of competitive shooters in today\'s ever-evolving field. It does not compromise on quality, ensuring that it functions optimally both with and without a suppressor.The Mini Q.D. Flash Hider is versatile and compatible with a broad range of systems. These include Turbo T2\'s, Turbo K\'s, Resonator\'s, Resonator R2\'s, Resonator K\'s, and Nitro .30. It also works seamlessly with all Phantom .30 caliber suppressors, and our latest R9 9mm and Nitro N2O sound suppressors. To secure the device correctly, torque between 20 and 30 ft-lbs is recommended.