MAXX CNC Aluminum Hopup Chamber M4W (for MTW M4)CNC Aluminum Hopup Chamber M4W unit is precisely machined to perform accurately and consistently on HPA MTW Milspec, Forged, Billet and MTW 9 series. The Hopup Chamber M4W unit is built with an aluminum Rotary Dial Knob for fine hopup adjustments, the precision Hopup Lever and 4mm Bucking Nubs to perform best with R Hop and Standard Hop to keep the BB shooting accurately and consistently on every single shot. The Hopup Chamber M4W unit is designed to
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