White Label Armory AR-15 A2 5.56 NATO 1/2-28 Flash Hider Black. 56mm - Specifications for White Label Armory AR-15 5.56 NATO 1/2-28 Flash Hider: Manufacturer: White Label Armory Color: Black Caliber: 5.56x45mm NATO Threads per Inch: 1/2x28 Gun Make: AR Platform Gun Model: AR-15 VKTR Industries WLA-BRL-4007 Flash Hider A2 Black 1/2"x28 Threads 5.56mm What firearm models does the manufacturer say White Label Armory AR-15 5.56 NATO 1/2-28 Flash Hider is compatible with? The manufacturer suggests that White Label Armory AR-15 5.56 NATO 1/2-28 Flash Hider is compatible with AR-15White Label Armory WLA-BRL-4007: AR-15 A2 5.56 NATO 1/2-28 Flash Hider Black