Hop-Up chamber Upgrade Parts.
This One-Piece Metal Chamber Set is more durable and accurate in feeding BB.
Improves Firmness of the chamber & stabilizes the muzzle velocity.
Enhanced Hop-Up bucking for accuracy.
Suitable for M4 / M16 series airsoft electric gun AEG gearbox (Version 2).
Fit tightly to the barrel base to keep the chamber being centered.
Unlike stock plastic chamber which would bend & de-shape, this metal one give you rigidity.
Require expert on installing into stock AEG.
Upgrading AEG require necessary skill & technique to dissemble the gearbox, consult expertise if needed.