- Modified double O-ring design
- Red-designed to avoid abnormal gear movement
- Improved barrel locking system
- Precision cut
Construction: POM / Zinc Alloy
Compatibility: M4 / M16 AEG models
Package includes: Hop-up chamber, adjustment wheels, two O-rings, tension springs, 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.