USED SilencerCo ASR Flash Hider 1/2x36 9mm Black. They offer one hand on one hand off attachment/detachment. The patent-pending resonance suppression effectively eliminates the tuning-fork effect common with competing 3-prong flash hiders. The 3-port muzzle brake design effectively reduces felt recoil and muzzle climb. Specifications for SilencerCo ASR Flash Hider: Manufacturer: SilencerCo Color: Black Fabric/Material: Steel Additional Features: Resonance suppression compatible with ASR mounting system Included Accessories: Standard Package Contents: SilencerCo ASR Flash Hider SilencerCo AC1562: ASR Flash Hider 1/2x36 9mm Black