The ideal Mini Q.D. Flash Hider for YHM's fast-attach sound suppressor systems. The Mini Q.D. Flash Hider is YHM engineering perfection. Compact at only 2 1/8" inches and weighing just 3.3 ounces, the Mini Q.D. Flash Hider was designed for today's competitive shooter. No shortcuts were taken, and users will find that the Mini Q.D. Flash Hider is still capable of being shot comfortably unsuppressed or suppressed. The muzzle device length is 2.118". Length added to the barrel is 1.493" (on barrels with 0.6" threads). Must locate on the shoulder behind the thread 2 1/8" overall length 3.3 Oz. Phosphate finish These flash hiders ARE COMPATIBLE with: Turbo T2's, Turbo K's, Resonator's, Resonator R2's, Resonator K's, Nitro .30, all Phantom .30 caliber suppressors, as well as our new R9 9mm, NITRO N2O sound suppressors and Wraith 9 XL. These flash hiders WILL NOT fit: Original TURBO, Phantom 5.56mm/.223 suppressors, Wraith 45 XL, Phantom .338. The device should be torqued to between 20 and 30 Ft-lbs.