NexxSpeed CNC Hop Chamber for M4 AEG NEW VERSIONThis is the new version with bb retention NexxSpeed CNC Hop Chambers are very modular and versatile as they allow for very fine tuning. Made from CNC Aluminum. Kit includes different nubs, arms, input adapters, and shim. 3x different Hop tensioners 3x different length inlet adapters The design with the arm pressing on the Nub is steel sheets with different thicknesses, which combine to create the desired elasticity, thereby helping to increase the
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