MAXX M4A-PRO hop-up chamber - Specna Arms

High-quality MAXX M4A-PRO hop-up chamber from Specna Arms in collaboration with MAXX. This is a first-class, high-quality chamber made of CNC-machined aluminum. It is designed for M4 carbines and M16 rifles and is compatible with most manufacturers of these replicas. A rotary knob is used for adjustment. The chamber is compatible with most standard hop-up rubbers. The chamber has the ability to retain the BB when the magazine is removed.