Prowin

The ProWin M4 / M16 CNC Hop Up Chamber is a great upgrade from your AEG's stock plastic, or weak cast metal hop up chamber. Metal hop up chambers are known for providing a better air seal against the AEG's gearbox, and feeding much more smoothly th...

A Precision buit CNC Aluminum Hop Up Unit from ProWin. These unique hop up units perform very well, chances are, if you have heard of them you probably already know they are one of the best hop ups in the business.

A Precision buit CNC Aluminum Hop Up Unit from ProWin. These unique hop up units perform very well, chances are, if you have heard of them you probably already know they are one of the best hop ups in the business. This ProWing hop up fits standard A...