Rearden Alpha Atlas Thread Adapter Features The Rearden Alpha Atlas Thread Adapter is a suppressor mounting adapter engineered for suppressors utilizing the 1.125x28 Alpha thread pattern commonly found on the Rugged Obsidian 9 and Obsidian 45 enabling compatibility with the Plan B muzzle device ecosystem including Rearden short devices and Q Cherry Bomb without additional adapters. Its design is optimized for use with shorter muzzle devices helping maintain a compact overall suppressor setup that preserves the host platform s handling characteristics. Compatibility extends across all Rearden short muzzle devices including the FHD Mini SPB RPB and R2S as well as Q Cherry Bomb and other Plan B-compatible interfaces for broad mounting flexibility. The black nitride 17-4 PH suppressor thread adapter is finished with a nitride surface treatment that delivers superior hardness corrosion resistance and a consistent black appearance that holds up to repeated suppressor attachment cycles field exposure and sustained heat without degradation. Adding only 0.350 of length and weighing just 1.22 oz the Alpha Atlas Thread Adapter integrates cleanly into the suppressor setup without meaningful weight or length penalty. Proper installation and alignment are recommended to ensure safe and reliable operation across all compatible suppressor and muzzle device configurations. Rearden Alpha Atlas Thread Adapter Specifications Manufacturer: Rearden Model: Alpha Atlas Thread Adapter Type: Suppressor Thread Adapter Material: 17-4 PH Stainless Steel Finish: Black Nitride Color: Black Weight: 1.22 oz Suppressor Interface: 1.125x28 (Alpha) Length Added: 0.350 Mount Type: Atlas / Plan B Interface Compatible Suppressors: Rugged Obsidian 9 Obsidian 45 Suppressors with 1.125x28 Alpha Threading Compatible Muzzle Devices: Rearden FHD Mini SPB RPB R2S Q Cherry Bomb Plan B-Compatible Devices