Features:
A.P.S. Hop-Up chamber Upgrade Parts.
Suitable for M4 / M16 series airsoft electric gun AEG gearbox (Version 2).
Fit tightly to the barrel base to keep the chamber being centered.
Includes all parts needed for installation.
As always, upgrading AEG require necessary skill & technique to dissemble the gearbox, consult expertise if needed.
DETAILS:
Built Material - plastic