The HUXWRX QD Flash Hider is designed to mitigate flash when unsuppressed. Muzzle device length is 2.3 inches, length added to the barrel is 1.7 inches (on barrels with 0.6" threads). The Flash Hider is compatible with the HX-QD series and FLOW series suppressors. This flash hider is only compatible with VENTUM series suppressors when combined with the HUX HUB Adapter. NOTE: Larger caliber mounts are NOT compatible with smaller caliber suppressors. Smaller caliber mounts ARE compatible with larger caliber suppressors.