G&G have shared details of their complete gearbox for GR16:
Gearbox
Our complete gearbox provides the perfect solution for anyone looking to revive their AEG. Easily drop-in the gearbox into your receiver and avoid the complications of assembling your internals. Compatible with any non-blowback G&G AEG.Contact your local G&G Dealer for availability and pricing.
G&G
