The Yankee Hill 431528A Mini QD Flash Hider, as per the manufacturer: WILL NOT fit Original TURBO, Phantom 5.56mm/.223 suppressors, Wraith 45 XL, Phantom .338. 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 R9 9mm, NITRO N2O sound suppressors and Wraith 9 XL.
The flash hider itself is compatible with 5.56. It just isn't compatible with the Phantom 5.56mm/.223 suppressors.
Ok great. I thank you much for the clarification. I do think the product description should be amended since it does say the "5.56 Phantom" which is confusing.