MAXX CNC Aluminum M4 Hop Up Chamber ME ProPRODUCT INFORMATION CNC Aluminum Hopup Chamber ME Pro (with BB Latching System) unit is precisely made to improve accuracy and ensure consistent air seal for Tokyo Marui (include KRYTAC, except KWA) M4 M16 Standard AEG series. The Hopup Chamber ME unit has a precision rotary dial design for fine hopup adjustments, also re engineered the hopup levers and concave nubs to work best with R hop, Flat Hop and Standard Hop to keep the BBs shooting straight
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