Comstock Armory 4-Prong Flash Hider .300 AAC Blackout 5/8x24 Black Nitride Black. 900"-24 adapters like the Comstock LPA Q Plan-B and Rearden Atlas. The 4-Prong offers the best possible flash performance and features mass shifted tines to prevent the ringing noise that affects many other pronged flash hiders. Specifications for Comstock Armory 4-Prong Flash Hider: Manufacturer: Comstock Armory Color: Black Finish: Black Nitride Fabric/Material: Stainless Steel Gun Make: Universal Outer Diameter: 0.9 in Features of Comstock Armory 4-Prong Flash Hider Allows for the quick attachment and removal of suppressors High strength 17-4 PH stainless steel Durable black nitride finish Standard 1/2-28 threads for use on 5.56/.223 barrels 5/8-24 threads for use on 300BLK and 7.62 barrels Effectively hides muzzle flash Rotationally symmetric and does not need to be timed with shims Mass shifted tines to prevent ringing Package Contents: Comstock Armory 4-Prong Flash Hider Comstock Armory 4P-58-30: 4-Prong Flash Hider .300 AAC Blackout 5/8x24 Black Nitride Black