JM Gen8 Gen9 Gen10 Upgrade Gearbox Parts

Jinming Gen8 Gen9 Gen10 Upgrade Metal Replacement Accessories Kit

for scar and jm gen8 m4a1 or jm gen9 gen10 gel blaster gearbox upgrade.

j8 package includes:

1x 18:1 metal gears.

1x piston with metal ladder.

1x steel cylinder.

1x high speed 460 motor 30000rpm.

1x 1.2mm hardened spring 14cm.

J9 J10 upgrade package includes:

1x 18:1 metal gears

1x piston with metal ladder

1x steel cylinder

1x high speed 470 motor 45000rpm

1x 1.2mm hardened spring 14cm