ARES Hop Up Chamber Set for Ares Amoeba M4 AEG Series
Improves Firmness of the chamber & stabilizes the muzzle velocity
Includes all parts needed for installation
Come With Hop up Rubber
Suitable for Ares Amoeba M4 AEG Rifle
Require expert on installing into stock AEG

As always, upgrading AEG require necessary skill & technique to dissemble the gearbox, consult expertise if needed