Reinforcement gearbox system for M4/M16 replicas

Reinforcement
Gearbox system for M4/M16 replicas

A reinforcing gear system is designed to
fill the empty space between the gearbox skeleton and the hop-up chamber
of the hop-up chamber and thus additionally secure the front of the skeleton by
part of the forces acting on the replica body during each working cycle of the piston.
working cycle of the piston. This extends the service life of the transmission skeleton.
skeleton. The installation of this module is also advisable for any major performance upgrade.
Performance tuning.