Product Description
RETRO Arms CNC Gearbox V3 8mm QSC
- Spring holders have grooves, so the springs for tapped plate and trigger switch will not jump off.
- All threads are now shaped instead of cut for better strength.
- Both of the gearbox parts are centered by milled grooves and edges.
- For better durability, they added more material around cylinder head part of the gearbox.
- Outer edges are now cut off.
Package includes: CNC Upper Gearbox ICS AR15 (EBB), set of screws.