A Plus Airsoft GBB AR Series Hop Up Chamber for GHK

A Plus Airsoft GBB AR Series Hop Up Chamber for GHK CNC Aluminum Construction Suitable GHK M4 Series Airsoft Gas Blow Back GBB Rifle Compatible with VSR-10 type inner barrels and hop buckings ( with side tab removed ) Item also fits G&P, Western Arms, Inokatsu AR series, silver part will need to be removed to fit these systems, Western arms systems will need to use negative pressure bolt carrier , hopup system takes standard Tokyo Marui vsr-10 type buckings and inner barrel As always, upgrading rifle require necessary skill & technique to dissemble the gearbox, consult expertise if needed