CNC Aluminium Hop up Chamber ME Sport (with BB Catching System) unit is precisely made to improve accuracy and ensure consistent air seal for Tokyo Marui (include KRYTAC and KWA) M4/M16 Standard AEG series. 

The Hop up Chamber ME unit has a precision rotary dial design for fine hop up adjustments, also re-engineered the hop up levers and concave nubs to work best with R-hop, Flat-Hop and Standard-Hop to keep the BBs shooting straight and accurate on every single shot. 

The Hop up Chamber ME unit is designed to accept the nozzle length from 21.00mm to 21.25mm, and fully compatible with most aftermarket soft and hard rubber bucking without losing FPS or dropping BBs. 

The Hop up Chamber ME Housing is equipped with a new CNC Delrin Locking C-Clip design to hold barrel tight without wobbling and twisting, and 3 compression springs on top, at bottom and in centre of housing to ensure the hop up unit is exactly centred, straight and air tight at all times when adapted to any V2 gear boxes with 11mm or 11.5mm inner bore. 

More than that, the Hop up Chamber ME Sport unit is specially designed with BB Catching System to prevent dropping BBs after removing the magazine.