- O-Ring Seal on Gearbox Side
- Includes all Hop-Up Unit parts.
- Assembly required!
|Compatibility||M4/M16/SR-16/M4 RIS and AK Series Rifles and other compatible AEG models with M4 HopUp Units|
DISCLAIMER: Please use discretion when installing custom parts as fit and compatibility may vary. Some modification may be required. Professional installation recommended.