Maxx Model CNC Aluminum Hopup Chamber ME - PRO (Limited Red Edition) nexxspeed Real Deal recommends starting with

Real Deal recommends starting with the stiff spring

It is safe to use a Metal Piston head with this cylinder head

0 or the Torque Boi

and re-testing

Retro Arms CNC Hop Chamber

Maxx Model CNC Aluminum Hopup Chamber ME - PRO (Limited Red Edition) nexxspeed Real Deal recommends starting withFor best Air seal and to avoid feeding issues use a max 21mm nozzle 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 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 and Standard Hop to keep the BBs shooting