• This Hop-up chamber unit features top notch air seal and is designed to provide the best possible bb flight control.


• Reinforced Metal Design


• Polished internal


• O-Ring Seal on Gearbox Side


• One-Piece Hopup unit.

Compatibility: M4, M16, M4A1, SR25, and other compatible Airsot AEG models that uses M4 Hopup units, One piece hop up.
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• This Hop-up chamber unit features top notch air seal and is designed to provide the best possible bb flight control.


• Reinforced Metal Design


• Polished internal


• O-Ring Seal on Gearbox Side


• One-Piece Hopup unit.

Compatibility: M4, M16, M4A1, SR25, and other compatible Airsot AEG models that uses M4 Hopup units, One piece hop up.