The Breek Arms Sentinel Caged Flash Hider is engineered specifically for 9mm firearms with 1/2x28 threading and features compatibility with the BREEK-LOK 3QD quick-detach system.Breek Arms Sentinel Caged Flash Hider (Model BRK4323)Designed for 9mm caliber firearms1/2x28 thread pitch for secure mountingCaged design for enhanced flash suppressionBREEK-LOK 3QD system compatibility for quick detachmentDurable construction for reliable performanceIdeal for tactical applications and range use this flash hider provides effective muzzle flash reduction while offering the convenience of quick-detach functionality for easy maintenance and configuration changes.