The Flash Hider-QD is engineered to mitigate flash with unsuppressed firearms. It is optimized for .223 Rem/5.56 NATO calibers.Key FeaturesCaliber Compatibility: Suitable for .223 Rem/5.56 NATO calibers.Mount Compatibility: Larger caliber mounts are not compatible with smaller caliber suppressors, while smaller caliber mounts can be used with larger caliber suppressors.Color: Finished in a durable black color.