Madbull Noveske Rifleworks Adjustable Gas Block for M4/M16 Barrel

Madbull Noveske Rifleworks Adjustable Gas Block for M4/M16 Barrel Adjustable Switchblock (Switch is turnable but non-functional) Aluminum construction Suitable for M4 / M16 Series Airsoft Rifle Good looking with Airsoft AEG Dummy Gas Tube Inner Diameter: Approx. 18mm