KAC licenced product for airsoft /milsim only, which is not compatible with real firearm.
Comes with licenced KAC laser / engrave marking.

Package included:
Barrel Extension:
Aluminum Construction.
CQB Version with QD design.
Comes with foam insert.
Easy fit with the 3-Prong KAC flash hider.
Size: Dia 40mm X 125mm

Flash Hider:
Steel construction.
3-Prong design.
14mm CCW thread.

Manufacturer: Knight's Armament Airsoft