CNC ALUMINUM HOPUP CHAMBER MGW GBB VER. (FOR MTW M4)Features Machined from a solid aircraft aluminum block with tight tolerances to achieve the most accuracy, consistency, and durability Performed accurately and consistently on HPA MTW Milspec, Forged, Billet and MTW 9 series Precision Rotary Dial Knob for fine hopup adjustments Re engineered the precision Hopup Lever and 4mm Bucking Nubs (6mm Bucking Nubs are optional) to perform best with R Hop and Standard Hop to keep the BB shooting accurately and
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