Comstock Armory Retro 3-Prong Plan-B Flash Hider, 1/2x28, 5.56, Black Nitride The Comstock Armory Retro 3-Prong Flash Hider combines classic styling with a modern Plan-B suppressor mounting interface. Designed for 5.56/.223 rifles with standard 1/2-28 barrel threads, this flash hider is compatible with common .900"-24 Plan-B adapters, including the Comstock LPA, Q Plan-B, Rearden Atlas, and other compatible mounting systems. Its three-prong design provides effective muzzle-flash reduction without the noticeable ringing associated with many pronged flash hiders. The rotationally symmetric design also eliminates the need for timing or shims, simplifying installation. Machined from high-strength 17-4 PH stainless steel and protected by a durable black nitride finish, it weighs just 2.1 ounces and measures 1.8" overall. Features Retro-inspired 3-prong flash hider Plan-B compatible suppressor mounting interface Compatible with common .900"-24 adapters Compatible with Comstock LPA, Q Plan-B and Rearden Atlas Standard 1/2-28 barrel threads Designed for 5.56/.223 barrels Allows quick suppressor attachment and removal Effectively reduces muzzle flash Designed to minimize the ringing common with pronged flash hiders No timing or shims required Rotationally symmetric design High-strength 17-4 PH stainless steel Durable black nitride finish 3/4" wrench flats for installation and removal 1.8" overall length Approximately 1.17" added muzzle length Lightweight 2.1 oz construction Not compatible with 9mm firearms Specifications Manufacturer: Comstock Armory Type: Retro 3-Prong Flash Hider / Plan-B Suppressor Mount Thread Pitch: 1/2-28 Caliber Compatibility: 5.56mm / .223 Remington Mount Interface: .900"-24 Plan-B Compatible Material: 17-4 PH Stainless Steel Finish: Black Nitride Overall Length: 1.8" Added Length: Approximately 1.17" Weight: 2.1 oz SKU: 3PR-12-22 UPC: 850069580445 RPA Fitment Note Because the 3-Prong uses two wrench flats at its base rather than a full hex, a socket cannot be used inside the RPA to remove the muzzle device if it becomes stuck. Proper installation of both the muzzle device and adapter is important. Follow Comstock Armory's installation instructions and recommended specifications. Important Compatibility & Safety Information This muzzle device is not compatible with 9mm firearms. Always confirm barrel, muzzle device, adapter, and suppressor compatibility before use. Some suppressor manufacturers may restrict warranty coverage when aftermarket mounting components are used. Verify bullet stabilization and suppressor alignment before firing and follow all manufacturer installation and safety instructions. The Comstock Armory Retro 3-Prong 1/2-28 Plan-B Flash Hider Suppressor Mount is available from BattleHawk Armory. Shop the Comstock Armory 3PR-12-22 at BattleHawk Armory.