Product Description The SilencerCo ASR Flash Hider is a steel, black-finished muzzle device designed for 5.56x45mm NATO barrels with 1/2"-28 TPI threads. It is compatible with SilencerCo ASR (Active Spring Retention) mounts, offering a quick attach/detach solution for use across many SilencerCo suppressors. The one-hand-on, one-hand-off mounting system works with ASR muzzle devices to make transferring a suppressor between hosts fast and secure. Once shouldered, the locking ring helps prevent the suppressor from rotating or working loose under heavy firing schedules. A patent-pending resonance suppression design helps eliminate the "tuning-fork" effect common with competing 3-prong flash hiders. Product Highlights ASR (Active Spring Retention) compatible flash hider for quick attach/detach suppressor mounting 1/2"-28 TPI threads for common 5.56 NATO / .223 platforms Durable steel construction with black finish Locking ring design helps prevent the suppressor from rotating or backing off during high round counts Patent-pending resonance suppression helps reduce the "tuning-fork" ring typical of 3-prong flash hiders Specs Brand: SilencerCo Product Type: ASR flash hider / suppressor mount muzzle device Caliber: 5.56x45mm NATO Thread Pitch: 1/2"-28 TPI Material: Steel Color/Finish: Black Compatibility: SilencerCo ASR (Active Spring Retention) mounts; compatible with ASR muzzle devices Manufacturer Part Number: AC141 UPC: 817272010329 Disclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product&&';;s manufacturer.