Quick view Details Pro Win | sku: PW HU M4 ProWin M4 and M16 CNC Hop Up Chamber Now: $28.99 Add to Cart Compare Quick view Pro Win | sku: PW HU M4 ProWin M4 and M16 CNC Hop Up Chamber 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 than... Now: $28.99 Add to Cart Compare Compare Selected
Quick view Pro Win | sku: PW HU M4 ProWin M4 and M16 CNC Hop Up Chamber 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 than... Now: $28.99 Add to Cart Compare Compare Selected
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