ProWin HopUp Chamber M4, Marui AEG
Popular hopup chamber for most M4/M16 models on the market.
Features include:
- Full CNC and anodized blue high grade aluminum body
- Hop up adjustable via ring for utmost stability in comparison to the gear type
- Retaining clips and pins all designed for quick change of worn hop packing/rubber
- Highly durable and promotes high accuracy and lasting shooting stability
- Significantly lighter and stronger material than the traditional cast metal type hop up units