- Modified O-ring design
- Re-designed to avoid abnormal gear movement
- Improved barrel locking system
- Precision cut
- Additional upgraded pressure plate arm
Compatibility: M4 / M16 AEG models
Package includes: Hop up chamber, adjustment wheels, O-rings, tension springs, stock hop up arm, upgraded hop up arm
Note: Airsoft Megastore recommends that all internal upgrades and or repairs be handled by a qualified airsoft technician. Airsoft Megastore is NOT responsible for improperly installed replacement or upgrade airsoft parts. DO NOT disassemble your airsoft gun within Airsoft Megastore's warranty period, as this will VOID your warranty.