Pro-1 M4 Metal Hopup Chamber



13 items in stock

The Pro-1 M4 Metal Hopup Chamber is an advanced design similar to the Prowin, but with a different cut and some extra parts included.  Clean and aluminum make will fit in all M4 AEG airsoft guns' gearboxes.  Includes SHS rubber bucking, but we recommend another bucking sold separately.  Great for HPA gun installs!

Packaging is Rocket Airsoft (OEM).