Hop up unit, M4/AR
Metal body, includes blue 60 degree Hop-up bucking.
Chamber Lock, and Easy Adjustment Device.

Chamber Lock: This new design provides a way to keep BB’s in the Hop-up chamber ready to use and prevents BB's from falling out when changing magazine. It stabilizes the top of the magazine to ensure a secure and flawless feed of BB’s into the AEG.

CAUTION: This hop up unit is designed for the experienced and responsible Airsoft player. With the magazine removed the AEG is still able to fire several BB’s. Always wear safety goggles and treat all Airsoft weapons as if they were loaded.

Hop up unit, M4/AR